EP3161170A1

EP3161170A1 - Method for tempering a clothing wire for processing textile fibres and plant therefor

Info

Publication number: EP3161170A1
Application number: EP15726860.8A
Authority: EP
Inventors: Friedrich Haarer
Original assignee: Truetzschler GmbH and Co KG
Current assignee: Truetzschler Group SE
Priority date: 2014-06-24
Filing date: 2015-05-08
Publication date: 2017-05-03
Anticipated expiration: 2035-05-08
Also published as: JP6395335B2; BR112016030019B8; BR112016030019B1; EP3161170B1; US20170121784A1; CN106460086B; CN106460086A; DE102014108822A1; WO2015197150A1; EP3161170B2; BR112016030019A2; US10344347B2; JP2017523307A

Abstract

The present invention relates to a method for tempering a clothing wire (1) for processing textile fibres and a plant (100) therefor, wherein the clothing wire (1) has a row of teeth arranged in the longitudinal direction thereof, and wherein the clothing wire (1) is passed through a heating region (11) in a wire running direction in order to come into contact with at least one open flame (10), wherein a quenching bath (12) having a quenching fluid (13) and a subsequent tempering device (14) follow the heating region (11). According to the invention, the clothing wire (1) moving in the wire running direction is washed around by a protective medium (16) in a transfer region (15) between the region of contact with the open flame (10) and entry into the quenching fluid (13).

Description

Process for hardening a clothing wire for processing textile fibers and installation therefor

description

The present invention relates to a method for hardening a clothing wire for processing textile fibers and an installation therefor, wherein the clothing wire has a series of teeth arranged in its longitudinal direction, and wherein the clothing wire for contact with at least one open flame through a heating area in a passage direction is passed, wherein connect to the heating region, a quenching bath with a quenching liquid and a subsequent starting device.

Garnish wires have a sawtooth profile and are mounted on cylindrical drums or rollers to form a card. As a result, the cards are provided with a toothed mantle surface, and the use of a garniture wire can be used, for example, to form a spool or pick-up and can be several kilometers in length. In order to provide sufficient strength and wear resistance of the clothing wire, methods for curing the clothing wire are known, which are based in particular on a flame hardening.

The hardening process preferably uses an open flame to form a heating region, through which the clothing wire is guided in its longitudinal direction. In this case, only the teeth should be hardened and the tooth root have a high toughness, which can be achieved, for example, by soft annealing. The heating region can be preceded by a rinsing chamber, which enables at least partial cleaning of the clothing wire. After passing through the heating zone, the clothing wire must be quenched by passing the clothing wire into a quench bath filled with a quench liquid. Subsequently, the clothing wire can be passed through a starting device and by a subsequent cooling device to the starting device.

The curing of a clothing wire over an open flame has been found to be particularly advantageous, however, can form on the surface of Garniturdrahtes scaling, which is always to be avoided.

In particular, when mounting the clothing wire on a drum or

Roller can be at a verzunderten surface of the clothing wire

Difficulties arise because the helical winding of the clothing wire on the cylindrical roller must be made very accurate, and for mounting a wire guide device is used, which can not work properly at a scaled surface of the clothing wire.

From DE 10 2005 025 627 B3 a method for curing a clothing wire is known, in which it is proposed to carry out the curing process itself with the exclusion of oxygen. For this purpose, protective gas is to be entered into the heating area, wherein only enough oxygen is added to form the open flame, as required for the reaction with a fuel gas. In order to carry out the feeding of a protective gas with simultaneous supply of a fuel-air mixture, a mixing device is proposed, so that the fuel-air mixture burns so that no unburned oxygen reaches the clothing wire. Thus, the atmosphere in the heating area should be kept free of oxygen, for which purpose the protective gas is thus additionally introduced into the heating area. However, further experiments have surprisingly revealed that even without the introduction of protective gas in the heating range, scaling of the clothing wire at the outlet from the heating region can be avoided. This may be due to residues of detergents, oils or other hydrocarbons that adhere to the surface of the clothing wire and burn in the open flame, thus avoiding a reaction of the clothing wire with oxygen. The finding is based in particular on the fact that in the immediate outlet of the clothing wire from the heating area, the surface of the clothing wire is not scaled. After passing through the entire process for hardening the clothing wire, however, a scaling is still observed on the surface of the clothing wire. This scaling suggests that the clothing wire, while still heated, comes into contact with a reactant which is to be avoided.

The object of the invention is the development of a method for curing a clothing wire for the processing of textile fibers, which allows a scale-free surface of the clothing wire despite a simple construction of a system for curing the clothing wire. In particular, the expensive rinsing of the heating area should be avoided with a protective gas.

This object is achieved on the basis of a method for curing a clothing wire according to the preamble of claim 1 and starting from a system for curing a clothing wire according to the preamble of claim 9 in conjunction with the respective characterizing features. Advantageous developments of the inventions are specified in the dependent claims.

The invention includes the technical teaching that the clothing wire moving in the wire running direction is in a transfer area between the contact area with the open flame and the inlet to the quenching liquid is washed with a protective medium.

The invention is based on the idea that the clothing wire between the open flame and the immersion in the quenching liquid is washed with a protective medium to avoid contact of the clothing wire with oxygen even after passing through the Garniturdrahtes by the heating area. Investigations have shown that even after the clothing wire has come out of the heating region, the temperature of the clothing wire is still so high that reaction of the material of the clothing wire with oxygen can subsequently also lead to scaling of the surface of the clothing wire. The scaling of the clothing wire is not carried out in the heating area itself but only after leaving the heating area, which is effectively avoided by the inventive washing around the clothing wire with a protective medium. If the clothing wire comes into contact with the quenching liquid in the quenching bath, the temperature of the clothing wire decreases in such a way that contact of the clothing wire with oxygen does not lead to any further scaling after passing through the quenching bath. As a result, the method according to the invention for hardening a clothing wire makes it possible to provide a scaling-free clothing wire in a simple manner. In contrast to the prior art can be dispensed with an elaborate heating chamber or oven, within which the flames are generated, and the invention must not be kept free of oxygen.

For example, in the transfer region between the heating region and the quenching bath, the clothing wire can be lapped with nitrogen, which forms the protective medium, whereby alternative protective media can also be used, in particular inert gases. Important in the formation of the transfer area is the immediate transfer of Garniturdrahtes from the open flame in the transfer area to immediately wash around the clothing wire with nitrogen. Equally important is the direct transfer of the clothing wire from the nitrogen atmosphere into the quench liquid. The transfer area is therefore designed such that the clothing wire is transferred from the open flame directly into the protective medium, and from the transfer area of the clothing wire must be transferred directly from the protective medium in the quench liquid.

The transfer area can be enclosed, for example, with a protective chamber into which the protective medium is introduced. The transfer area must be minimized in the wire running direction to provide a sufficient distance of the quench bath from the heating area so that the quench liquid in the quench bath does not heat up through the open flame of the heating area. The protective chamber may be box-shaped or, for example, also rohrformig, and the introduction of a protective medium can take place via a control valve. In particular, the introduction of the protective medium into the protective chamber can be carried out so that the protective medium flows through the protective chamber counter to the wire running direction.

The protective chamber may be under pressure by the introduction of the protective medium, and wherein the protective chamber may have an inlet opening through which the clothing wire enters the protective chamber and through the inlet opening can simultaneously escape the protective medium from the protective chamber against the wire running direction, for example in the heating region. The protective medium can be entrained by the open flames, and be sucked through a hood. According to an advantageous variant of the method according to the invention, the protective medium can not or not exclusively by a gas but by a liquid, for example by the quenching liquid from the quenching bath, are formed. For this purpose, it may be provided to bring the quenching liquid for bridging the transfer region counter to the wire running direction in the direction of the heating region and preferably substantially up to the heating region. According to the advantageous variant, the quenching liquid can bridge the transfer area without the quenching bath itself projecting up to the heating area.

For example, the quench liquid can be brought to the heating region with a flow movement in a flow direction from the quench bath, the flow direction being opposite to the wire feed direction of the clothing wire. For example, the bridging region can be formed by a wire feed pipe or by a wire feed trough, through which or through which the quenching liquid runs counter to the wire running direction. The inlet opening to the inlet of the clothing wire in the wire tube or in the wire trough can zoom down to the heating range, and the outgoing quenching liquid can be collected via a collecting device and returned to the quench. Due to the flow in the quench liquid is achieved that they are not significantly heated by the hot, incoming Garniturdraht or by the flames due to their constant exchange.

The clothing wire can be passed through the heating area such that the tooth structure of the clothing wire points in the direction of the open flame. In this case, the open flame in the heating range can be brought from above or from below to the clothing wire. For example, the transfer area has a wire tube through which the Quenching liquid is fed to a pipe inlet opening, so the open flame can burn up and the clothing wire is located at a distance above the open flame. If the transfer area has a wire runner, the open flame can alternatively also be directed downwards and can be brought up to the gutter or even cover it slightly, so that the clothing wire from the open flame runs directly into the wire runner filled with quench liquid. In particular, this can produce an overlap between the open flame and the wire runner, which is preferably minimized, but the transition of the clothing wire from the open flame into the quench liquid is made possible without the use of inert gas safely in the absence of oxygen.

Alternatively, the clothing wire may also be arranged in the unwound direction, i. one side surface of the clothing wire points to the open flame, the opposite side surface away from it. Ultimately, the orientation of the teeth to the open flame is not essential to the invention, but it can be used to additionally influence the desired properties of the teeth or the tooth roots by the heat treatment. Preferably, the open flame is directed only to the teeth or tooth structure.

The present invention further relates to a system for curing a clothing wire for processing textile fibers with a series of teeth arranged in its longitudinal direction, wherein a heating region is provided with an open flame, through which the clothing wire can be guided in a wire running direction, and wherein connect to the heating area a quench bath with a quench liquid and a subsequent tempering device. According to the invention, there is a contact between the area of contact with the open flame and the inlet into the quenching liquid Transfer area arranged, which is designed for flushing the clothing wire with a protective medium.

The transfer region may be formed by a protective chamber, which is at least partially filled with a protective medium and in particular is flushed with this. For example, the protective chamber may be formed in a box shape or a tubular shape.

The protective medium may be formed by nitrogen, although other inert gases may be used. Alternatively, the protective medium may be formed by the quench liquid from the quench bath. In this case, the transfer region can have a wire feed pipe or a wire feed trough, through which or through the quenching liquid can be guided in the direction of the heating region. The wire running pipe can be designed to be closed and end in a pipe inlet opening, into which the clothing wire enters and from which the quench liquid for example discharges into a collecting device. The wire trough may for example be designed to be open at the top, and the upper flame of the heating region may extend to the end, in particular with a slight overlap, over the wire trough so that the clothing wire can enter the quench liquid directly from the open flame.

The open flame can be brought in the heating range from below or from above to the clothing wire, depending on whether a wire tube or about a wire trough is used. In particular, when using a wire trough to form the bridging region, the flame can be arranged above the clothing wire and burn down against the clothing wire. Further, measures improving the invention will be described with reference to preferred embodiments below with the description of a preferred embodiment of the invention with reference to the figures. It shows:

1 is a schematic view of a first embodiment of a system for curing a clothing wire and for carrying out the method according to the invention;

Fig. 2 is an enlarged view of the heating area and the subsequent transfer area with a modified

Variant of the transfer area and;

Fig. 3 is a further enlarged view of the heating region and the subsequent transfer region, wherein the open flame is arranged above the Garniturdrahtes.

Figure 1 shows in a schematic view a first embodiment of a plant 100 for carrying out the method for curing a clothing wire 1 with the features of the present invention. The clothing wire 1 is provided on a reel 30 and unwound from this to drive into the plant 100. When the clothing wire 1 has hardened out of the installation 100, it is wound up again on another reel 31. Usually shows a side surface of the clothing wire 1 down, and the opposite side surface of the clothing wire 1 upwards. It may also be useful to arrange the teeth upside down towards the burner mouth, whereby the clothing wire 1 after and before the reel 30, 31 rotated by 90 ° along the wire running direction 20 must become. The residual heat from the teeth can get into the tooth root, which can be exploited in the process of increasing the toughness of the tooth roots.

If the clothing wire 1 runs off of the reel 30, it is first introduced into a rinsing chamber 25, which serves to clean the clothing wire 1. The clothing wire then runs out of the rinsing chamber 25 and enters a heating region 11, which is essentially formed by one or more flames 10. The clothing wire 1 runs above the flames 10 through the heating region 11, for example, with a distance of about 6 mm from a side surface to the burner mouth. Above the clothing wire 1 is a hood 24 to suck in the heating region 11 gases produced. The flames 10 are generated by a plurality of burners, which are attached to a holder, not shown, and are fed with a fuel gas such as natural gas or propane gas. The burners are not encapsulated within the system 100 or arranged in a combustion chamber or a furnace, but freely accessible and are optionally additionally supplied with oxygen via the ambient air. According to the invention, the heating region 11 is followed by a transfer region 15, which may be formed on the front side with a dividing wall 28, in which case an inlet opening 18 is introduced in the dividing wall 28, to which a protective chamber 17 adjoins the rear side of the dividing wall 28. The illustration shows the open flames 10 only schematically, wherein the open flames 10 and thus the heating area 11 may be present adjacent to the partition wall 28.

The protective chamber 17 is filled with a protective medium 16, for example nitrogen. The protective medium 16 can via a supply line in the Protective chamber 17 are permanently tracked and exit from the inlet opening 18 again. On the transfer area 15 follows in the wire running direction 20 a quenching bath 12 which is filled with a quenching liquid 13 and the quenching bath 12 is followed by a starting device 14. Finally, the clothing wire 1, after passing through the starting device 14, still discharges into a cooling device 26, from which the hardened Fitted wire 1 cools again expires, so that the clothing wire 1 can be wound up on another reel 31 again. According to the invention, between the heating area 11 and the quenching bath 12 there is a transfer area 15, which is provided in order to provide a distance between the heating area 11 and the quenching bath 12. In particular, it should be avoided that the quenching liquid 13 of the quenching bath 12 is not heated at the open flame 10. The transfer area 15 is formed by the protective chamber 17, which is flushed with the protective medium 16, so that contact of the clothing wire 1 after leaving the open flame 10 and until it enters the quench bath 12 does not come into contact with oxygen. For a scaling is avoided, in addition, it is avoided by the outflow of the protective medium 16 from the inlet opening 18 that oxygen reaches the clothing wire 1.

Over the section of the open flame 10, the clothing wire 1 can not come into contact with oxygen due to the contact with the open flame 10, since residues of oxygen burn with substances adhering to the surface of the clothing wire 1, thereby avoiding scaling of the clothing wire 1 , Due to the inventive design of a transfer region 15 with a protective gas atmosphere, a plant 100 is thus provided in a simple manner, the a scaling hardening of a Garniturdrahtes 1 an all-steel set for the processing of textile fibers allows. It is therefore no longer necessary to flush a heating or curing chamber under pressure with nitrogen, which makes the process considerably cheaper and easier to retrofit in terms of operating costs.

Figure 2 shows a modified embodiment of the system 100 in the heating zone 11 with the subsequent Abschreckbad 12. The open flames 10 are located below the clothing wire 1, which has a tooth structure 21, which is also directed downward, that is in the direction of the open flame 10 can be as shown in the expanded, enlarged view. Alternatively, the clothing wire 1 may also be arranged in the unwound direction, i. one side surface of the clothing wire faces the flame 10, the opposite side surface thereof away.

The heating area 11 is adjoined by the transfer area 15, which creates a space between the heating area 11 and the quench bath 12 in the wire running direction 20. In order to avoid contact of the clothing wire 1 with oxygen, a wire running pipe 22 is led out of the quenching bath 12, through which quenching liquid 13 passes in a flow direction 19. The flow direction 19 is opposite to the wire running direction 20, and the clothing wire 1 enters via a tube inlet opening 29 in the wire tube 22, while quenching liquid 13 from the tube inlet opening 29 terminates in a collecting device 27. Via a pump 32, the quenching liquid 13 can be pumped back into the quenching bath 12.

The wire running pipe 22 is brought so far to the heating area 11, that the leaking quenching liquid 13 is a direct transfer of the clothing wire 1 from the region of the open Flames 10 in the quenching liquid 13 allows. Thereby, any contact with oxygen is avoided, and the clothing wire 1 can leak out of the heating region 11 without scale formation and quenched in the quenching bath 12, and then run into the starting device 14.

Finally, Figure 3 shows the embodiment of another embodiment of the transfer area 15, through which a distance between the Abschreckbad 12 and the heating area 11 is provided with the open flame 10 without the clothing wire 1 can come into contact with oxygen. The heating area 1 has open flames 10 which burn upside down from top to bottom. The clothing wire 1 can be guided through the heating area 11 in such a way that the tooth structure 21 is directed towards the open flames 10, as shown in the enlarged, enlarged view. Alternatively, the clothing wire 1 can also be arranged here in the unwound direction, i. one side surface of the clothing wire faces the flame 10, the opposite side surface thereof away.

Immediately following the area of the open flames 10, the clothing wire 1 enters the quenching liquid 13, which passes through a wire feed trough 23. The clothing wire 1 runs into the wire runner 23, which is designed to be open at the top, that is to say in the direction of the open flames 10. As a result, it can be achieved that the open flames 10 extend to the quench liquid 13 or even cover it slightly. The clothing wire 1 runs in the wire running direction 20 from the open flames 10 into the quench liquid 13, so that any contact with oxygen is avoided. The quench liquid 13 enters the wire runner 23 from the quench bath 12 and completely encloses the clothing wire 1. At the end of the wire trough 23, the quenching liquid 13 passes over and enters a collecting device 27, from which the quenching liquid 13 can be pumped back into the quenching bath 12 via a pump 32.

As a result of the leakage of the quenching liquid 13 from the quenching bath 12, the quenching liquid 13 assumes a flow in a flow direction 19, which is opposite to the wire running direction 20. Due to the constant replacement of the quenching liquid 13 in the wire trough 23, the quenching liquid 13 in the region of the wire trough 23 neither by the contact with the hot clothing wire 1 nor by the contact with the open flame 10 is not significantly heated. As a result, a transfer region 15 can be formed in a simple manner, which allows a distance between the open flames 10 to the quench bath 12, without the clothing wire 1 can come into contact with oxygen.

The invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use. All of the claims, the description or the drawings resulting features and / or advantages, including constructive details or spatial arrangements may be essential to the invention both in itself and in various combinations. reference numeral

100 plant

1 clothing wire

10 open flame

11 heating range

12 quench bath

13 quench liquid

14 Starting device

15 transfer area

16 protective medium

17 protection chamber

18 inlet opening

19 flow direction

20 wire direction

21 tooth structure

22 wire tube

23 wire trough

24 extractor hood

25 rinsing chamber

26 cooling device

27 collecting device

28 partition

29 pipe inlet opening

30 reel

31 reel

32 pump

Claims

claims

A method of curing a clothing wire (1) for processing textile fibers, wherein the clothing wire (1) has a series of teeth arranged in its longitudinal direction, and wherein the clothing wire (1) is in contact with at least one open flame (10) a heating section (11) is passed in a wire running direction (20), wherein a quenching bath (12) with a quenching liquid (13) and a subsequent starting device (14) adjoin the heating zone (11),

characterized in that in the wire running direction (20) moving clothing wire (1) in a transfer region (15) between the contact region with the open flame (10) and the inlet to the quench liquid (13) with a protective medium (16) is washed.

2. The method according to claim 1, characterized in that the clothing wire (1) in the transfer region (15) is flushed with nitrogen, which forms the protective medium (16).

3. The method according to claim 1 or 2, characterized in that the transfer region (15) by a protective chamber (17) is enclosed, in which the protective medium (16) is introduced.

4. The method according to claim 3, characterized in that the protective chamber (17) by the introduction of the protective medium (16) is under pressure, and wherein the protective chamber (17) has an inlet opening (18) through which the clothing wire (1) in the protective chamber (17) enters and through which the protective medium (16) flows out of the protective chamber (17) against the wire running direction (20) into the heating area (11).

5. The method according to claim 1, characterized in that the protective medium (16) by the quenching liquid (13) is formed.

6. The method according to claim 5, characterized in that the quenching liquid (13) for bridging the transfer region (15) against the wire running direction (20) in the direction of the heating region (11) and preferably in the

Essentially up to the heating range (1) is introduced.

7. The method according to claim 6, characterized in that the quenching liquid (13) with a flow movement in a flow direction (19) from the quenching bath (12) to the

Heating range (11) is introduced, the

Flow direction (19) of the wire running direction (20) of the clothing wire (1) is opposite.

8. The method according to any one of the preceding claims, characterized in that the at least one open flame (10) in the heating region (11) is brought from above to the clothing wire (1).

A plant (100) for hardening a clothing wire (1) for processing textile fibers with a series of teeth arranged in its longitudinal direction, wherein a heating area (11) with an open flame (10) is provided, through which the Clothing wire (1) can be passed in a wire running direction (20), and wherein a quenching bath (12) with a quenching liquid (13) and a subsequent tempering device (14) adjoin the heating area (11),

characterized in that between the contact region with the open flame (10) and the inlet into the quenching liquid (13), a transfer region (15) is arranged, which is designed for flushing the clothing wire (1) with a protective medium (16).

10. Plant (100) according to claim 9, characterized in that the transfer region (15) by a protective chamber (17) is formed, which is at least partially filled with a protective medium (16) and in particular flushed with this.

11. Plant (100) according to claim 9 or 10, characterized in that the protective medium (16) is formed by nitrogen.

12. Plant (100) according to any one of claims 9 to 11, characterized in that the protective medium (16) through the

Quenching liquid (13) is formed.

13. Plant according to claim 12, characterized in that the transfer region (15) has a wire tube (22) or a wire trough (23), through or through the

Quenching liquid (13) in the direction of the heating region (11) is feasible. Plant (100) according to one of claims 9 to 13, characterized in that the at least one open flame (10) in the heating region (11) from below or from above to the clothing wire (1) is introduced.