EP2371999B1 - Twin wire twisting or cabling spindle - Google Patents

Description

The invention relates to a double-twisting or Kablierspindel according to the preamble of claim 1, see for example DE-29,31,391C2 ,

Modern double-twisting or Kablierspindeln usually have a stationary protective pot for receiving a supply bobbin, a hollow coil axis for guiding a thread through the twisting spindle and arranged below the feed bobbin, rotatably mounted, drivable spindle.

That is, in such double-twisting or Kablierspindeln the thread is withdrawn from a stationary supply bobbin up, introduced into the upper end of the hollow coil axis and thereby deflected downwards.

Within the coil axis, the thread is guided over a thread brake and then leaves the region of the coil axis via a radial opening which is arranged in a component of the rotatably mounted, drivable spindle.

After exiting the radial opening, the thread is temporarily stored on a storage disc of the spindle, before being guided to a fixed above the protective cup, stationary balloon yarn guide.

The thread forms due to the rotation of the spindle between a arranged in the storage disc, so-called discard plate and arranged above the protective cup balloon yarn guide a rotating around the protective cup yarn balloon.

After passing the balloon thread guide the twisted or cabled thread is wound by a winding device to a package.

In such double-wire twisting or Kablierspindeln the shape and size of the forming during the twisting thread balloon among other things depending on the diameter of the thread-drop element of the spindle.

That is, the double-twisting or cabling spindles often have, as in the DE 10 2006 029 055 A1 described, a driven by a tangential spindle, which in turn has a circumferential storage disc and a arranged above the storage disc, fixed to the storage disc thread-discard.

In order to prevent friction yarns, such as polypropylene, polyester or polyacrylic, that the thread balloon during the twisting process with the stationary protective pot comes into contact, which involves the risk of yarn breakage in itself, the diameter of this known thread-throwing disc is sized, that it is above the diameter of the stationary protective pot.

As a result, the yarn balloon circulating between the yarn discharge plate and the balloon yarn guide arranged above the protective pot generally has a relatively large diameter.

However, since large thread balloons known to lead to relatively large ventilation losses and thus to increased energy demand of the double-twisting spindle, has been made, especially in connection with less friction-sensitive yarn materials such as cotton, in the past, various attempts to the diameter of the thread balloons reduce or limit.

In the DE 44 04 555 C1 For example, double-twisting spindles are described, which in addition to a supply spool receiving, stationary protective pot have a protective cup, cylinder-like Balloonbegrenzer.

In such double-twisting spindles, the emergence of a relatively large in diameter thread balloon is effectively prevented by the fact that the thread immediately starts after leaving the relatively large diameter thread-Abwurftellers the spindle to the inside of the balloon.

A disadvantage of these known double-twisting spindles, however, is the relatively long physical contact of the revolving thread balloon with the stationary Balloonbegrenzer.

Since the stresses acting on the thread by such stationary balloon limiters are relatively high, such double-twisting spindles can only be used for relatively insensitive yarns.

Similar double-twisting spindles with stationary balloon limiters are also by the DE-OS 1 813 801 or the DE 33 47 318 A1 known.

In the double-twisting spindle according to DE-OS 1 813 801 However, the supply bobbin is not protected in a stationary protective pot arranged, but is open on a designed as a bobbin component of the double-twisting spindle.

In order to avoid contact between the revolving, outwardly supported on a cylindrical balloon restrictor thread balloon and the supply spool, in this double-twisting spindles also arranged between the balloon and the supply spool, cylindrical yarn guide is provided which surrounds the supply spool in height of the Balloonbegrenzeroberkante.

The double-twisting spindle according to DE 33 47 318 A1 has a bulky, cylindrical balloon limiter, in which a stationary protective pot, which has conically shaped end regions, is mounted.

That means, even at the by the DE-OS 1 813 801 or the DE 33 47 318 A1 known double-twisting spindles, the maximum diameter of the resulting thread balloon is determined by the inner diameter of a stationary, outer balloon limiter, so that the threads to be processed are not insignificantly loaded during the twisting process.

Furthermore, in the DE 29 31 391 C2 a twin-twisting spindle described in which the stationary protective pot, which has a reservoir for a lubricant in the bottom region, is slightly convex rounded.

The protective pot is also equipped in the area of the reservoir with an annular disc, which consists of an absorbent material.

In this known double-twisting spindle, the thread slides after leaving the relatively large-diameter thread-Abwurftellers the spindle on the washer on the protective pot and is wetted with a lubricant or a lubricant.

Based on the above-described prior art, the present invention seeks to modify a double-twisting or Kablierspindel so that the resulting during the twisting or Kablierprozesses thread balloons are as slim as possible, with the disadvantages described above, in particular the sliding along the thread on a outer, stationary balloon limiters, should be avoided.

This object is achieved by a double-twisting or Kablierspindel having the features described in claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

With a double-wire twisting or Kablierspindel whose rotatably mounted hollow spindle has a largest diameter which is at least 10% below the diameter of the line of contact of the pot bottom of the stationary protective pot with the thread, can be realized reliably relatively slim thread balloons during the twisting process.

These slim thread balloons have the advantage that the ventilation losses occurring during operation on the double-wire twisting or cabling spindles are significantly reduced, which leads to a noticeable reduction in the drive energy required in the operation of such double-wire twisting or cabling spindles.

As described in claim 2, it is provided in an advantageous embodiment that the rotatably mounted spindle, which guides the thread during the twisting or cabling, has a storage disc on the lateral surface of the thread slides.

Since such a storage disc is necessary anyway to compensate for the thread tension fluctuations occurring during the twisting or cabling by temporary storage of the thread, the use of the storage disc as a thread-shedding element is a cost-effective embodiment.

That is, in the embodiment used in claim 2 is dispensed with the use of a thread-throwing disc.

In an alternative embodiment, however, it may also be provided, as described in claim 3, that the spindle has, in addition to the storage disk, a thread discharge disc fixed to the storage disc.

Such a thread-dumping disc is usually set on top of the storage disc and is an advantageous thread guide means.

That is, by such a thread-throwing disc ensures that the thread is gently guided after leaving the storage disc upwards and thereby forms a slender thread balloon.

According to claim 4 is also provided in an advantageous embodiment, that the thread-throwing disc has a curved edge portion which rotates during the twisting or Kablierprozesses with play in an annular, downwardly open recess of the pot bottom of the protective pot. By such a design, the air turbulence usually occurring in the edge region of a rotating thread-Abwurftellers can be minimized.

As described in claim 5, it is further provided in an advantageous embodiment that the pot bottom of the stationary protective pot on its outer side, on which the thread slides during the twisting or Kablierprozesses along, has a thread-friendly deflection radius.

Such a thread-friendly deflection radius, whose dimension is between 8 mm and 20 mm, ensures that the thread sliding along the bottom of the pot during the twisting or cabling process is not overstressed or even damaged.

In an alternative embodiment, which is described in claim 6, it is provided that below the stationary protective pot, an adapter is arranged, which is rotatably connected to the pot bottom of the protective pot.

By switching on such an adapter, the contact surface of the thread can be minimized at the bottom of the pot and at the same time the thread balloon formed during the twisting process can be made slimmer.

To optimize the thread guide below the protective pot can also be provided that the adapter is covered by a arranged on the bottom of the pot, reaching to the discard, conically shaped shell piece (Anspr.7).

As described in claim 8, it is provided in a further alternative embodiment that the protective pot has a conical region below the line of contact of the thread with the protective pot.

Such a design of the protective pot allows a simple way of optimally receiving conical or biconical feed bobbins in the protective pot.

That is, the protective pot can always be maximally equipped even when processing such trained supply bobbin.

To reliably ensure that the thread is gently guided during the twisting or cabling process in the region of its contact line, it is provided in an advantageous embodiment that the protective pot is equipped in this area with a guide ring or a guide bead (Anspr.9).

The guide ring or the guide bead are preferably made of a hard and thread-friendly material, for example made of chrome-plated or polished steel, and ensure that the thread can not be damaged during the twisting or cabling process by the stationary protective pot. As set forth in claims 10 and 11, the guide ring or the guide bead is either attached to the pot bottom of the protective pot or fixed in the lower part of the pot casing surface of the protective pot. Both sites have proven to be beneficial in practice.

In order to realize the most slender possible thread balloon during the twisting process, it is provided according to claim 12, that between the touched during the twisting process by the thread circumference of the protective pot and the lower edge of the storage disk, a distance a is given, which can be between 1 and 120 mm ,

Such a relatively large distance can be achieved in a simple manner by the use of an adapter which is positioned below the protective pot.

As already explained in connection with claim 6, a relatively large distance a causes the yarn balloon formed during the twisting process to be stretched and thus kept slim.

Further details of the invention are the embodiments explained below with reference to FIGS removable.

Fig.1

schematisch eine Arbeitsstelle einer Doppeldraht-Zwirn-maschine, wobei die Doppeldraht-Zwirn- oder Kablierspindel über einen stationären Schutztopf verfügt, in dem eine Vorlagespule angeordnet ist, und eine rotierbar gelagerte Spindel vorgesehen ist, deren größter Durchmesser erheblich unter dem Durchmesser des Schutztopfes liegt,

Fig.2

im Schnitt ein erstes Ausführungsbeispiel einer Doppeldraht-Zwirn- oder Kablierspindel, wobei die rotierbar gelagerte Spindel der Doppeldraht-Zwirn- oder Kablierspindel mit einer Speicherscheibe und einem Abwurfteller ausgestattet ist,

Fig.3

im Schnitt weitere Ausführungsbeispiele einer Doppeldraht-Zwirn- oder Kablierspindel, deren rotierbar gelagerte Spindel jeweils lediglich mit einer Speicherscheibe ausgerüstet ist,

Fig.4

weitere Ausführungsbeispiele einer Doppeldraht-Zwirnoder Kablierspindel, wobei zwischen den stationären Schutztopf und den Abwurfteller der rotierbar gelagerten Spindel jeweils ein Adapter eingeschaltet ist, ebenfalls im Schnitt,

Fig.5

weitere Ausführungsbeispiele einer Doppeldraht-Zwirnoder Kablierspindel, wobei der Schutztopf zur Aufnahme einer konischen oder einer bikonischen Vorlagespule konzipiert ist.

It shows:

Fig.1

schematically a workstation of a double-twisting machine, the double-twisting or Kablierspindel has a stationary protective pot in which a supply spool is arranged, and a rotatably mounted spindle is provided whose largest diameter is considerably below the diameter of the protective pot

Fig.2

in section, a first embodiment of a double-twisting or Kablierspindel, the rotatably mounted spindle of the double-twisting or Kablierspindel is equipped with a storage disc and a discard,

Figure 3

in section further embodiments of a double-wire twisting or Kablierspindel whose rotatably mounted spindle is each equipped only with a storage disk,

Figure 4

Further embodiments of a double-twisting or Kablierspindel, wherein between the stationary protective pot and the discard of the rotatably mounted spindle in each case an adapter is turned on, also in section,

Figure 5

Further embodiments of a double-twisting or Kablierspindel, wherein the protective pot is designed to accommodate a conical or biconical feed bobbin.

The Fig.1 schematically shows a workstation 30 of a (not shown) double-twisting machine or cabling. Such workstations 30 have inter alia a double-twisting or cabling spindle 1, with a supply bobbin 4 mounted in a stationary protective pot 3, and a winding device 31 for winding the twisted yarn 5 into a package 32.

The stationary protective pot 3, which has a relatively large diameter D, has a pot bottom 2. Below the

Pot bottom 2 is a rotatably mounted spindle 6 of the double-twisting or cabling 1 arranged.

In the in Fig.1 illustrated embodiment, the spindle 6 is provided for rotating and guiding the thread 5 during the twisting or Kablierprozesses with a storage disc 12 and a thread-Abwurfteller 13, wherein the diameter d of the thread-Abwurftellers 13, in this case the largest diameter of rotatably mounted spindle 6 forms, as can be seen, significantly below the diameter D of the stationary protective pot 3.

As in Fig.1 shown further, during the twisting or Kablierbetriebes a guided by a rotatably mounted yarn guide 24 thread 5 subtracted from the supply spool 4 and threaded from above into the hollow coil axis 25 of the double-twisting or Kablierspindel 1.

The thread 5 is then, as known and therefore not explained in more detail, acted upon within the coil axis 25 by a (not shown) yarn brake and guided over the rotationally driven spindle 6 to the outside.

That is, the thread 5 passes through a radial opening 40 in the storage disk 12 of the rotating spindle 6 on the circular circumferential or lateral surface of the storage disk 12, where it is temporarily stored, depending on the particular thread tension present.

The thread 5 leaves the rotating spindle 6 in the illustrated embodiment on the thread-Abwurfteller 13, wherein the thread 5 during the twisting or Kablierprozesses between a line of contact 23 in the region of the pot bottom 2 of the protective pot 3 and arranged above the protective pot 3, stationary balloon yarn guide 33 forms a relatively slim thread balloon 50.

After passing through the stationary balloon yarn guide 33, the twisted yarn 5 is wound by means of the winding device 31 into a package 32.

The Fig.2 shows in detail a first embodiment of the inventive double-wire twisting or Kablierspindel 1, wherein both the rotatably mounted spindle 6 and the upper bearing means 11 for the stationary protective pot 2 and arranged below the stationary protective cup 2 bearing means 7 for the spindle 6 in section are shown. As indicated, the bearing devices 7 and 11 preferably each have two axially spaced-apart rolling bearings.

As can further be seen, the bearing device 7 is arranged in a bearing housing 9, which is fixed in a spindle bank 8 of the double-wire twisting or cabling machine, in which the spindle 6 of the double-wire twisting or cabling spindle 1 is rotatably mounted with its spindle shaft 43 ,

On the lower end of the spindle shaft 43, a whorl 44 is pressed, which is acted upon during the twisting process by a drivable tangential belt 10.

Preferably within the spindle shaft 43 and the whorl 44 a bore 26 which serves to facilitate the threading of the thread 5 in the double-twisting or Kablierspindel 1 and which is connected via a pressure line 27 and a defined controllable valve means 28 with a compressed air source 29 ,

To an intermediate part 34, which is preferably part of the spindle shaft 43, a storage disk 12 is non-rotatably connected.

A likewise connected rotationally fixed to the spindle shaft 43 spindle start part 35 forms the basis for the storage device 11 of the stationary protective pot. 3

The bearing device 11 has, for example, two axially spaced-apart rolling bearings.

That is, the rolling bearings are fixed with their inner rings on the spindle start part 35, while the cup bottom 2 of the protective pot 3 is mounted on the outer rings of these bearings.

As can be seen, the intermediate part 34 and the spindle starting part 35 are also provided with internal bores, with both the bore 36 of the spindle starting part 35 and the bore 37 of the intermediate part 34 merging into the radial opening 40 of the storage disc 12.

According to the in Fig.2 shown first embodiment is mounted on the storage disk 12, for example by means of bolts 41, a thread-Abwurfteller 13 whose largest diameter d clear, that is, at least 10% below the diameter D of the stationary protective pot 3.

With its upwardly curved edge region 14, the yarn discharge plate 13 grips with play into a circular recess 15, which is arranged on the underside of the pot bottom 2 and opens downwards.

Like from the Fig.2 can be seen, the pot bottom 2 in the region of its outer side 16 on a thread-friendly designed deflection radius R. The size of this deflection radius can be between 8 and 20 mm, for example, depending on the number of yarn areas to be processed by the double-twisting or cabling spindle.

The Figure 3 shows further embodiments of an inventively designed double-twisting or Kablierspindel. 1

An essential difference to that in the FIGS. 1 and 2 illustrated first embodiment of a double-twisting or Kablierspindel 1 is that in the embodiments according to Figure 3 the rotatably mounted spindle 6 has no thread-Abwurfteller.

As in Figure 3 shown, the thread 5 passes during the twisting or cabling through the coil axis 25 and the bore 36 to the radial bore 40 of the spindle. 6

The emerging from the radial opening 40 thread 5 is ßie-ßend temporarily stored on the circular peripheral or circumferential surface of the storage disk 12 before it is deflected in the direction of the pot bottom 2 of the stationary protective pot 2.

The thread 5 touches the bottom of the pot 2 in the region of a contact line 23, wherein the line of contact 23 of the thread 5, depending on the embodiment of the pot bottom 2 and the protective pot 3, either in the region of a friction-friendly deflection radius 16 (see left side of the Figure 3 ) or, as shown on the right side of the image, in the region of a guide ring or a guide bead 17 fastened, for example, to the protective pot 3.

In these embodiments, the maximum diameter d of the spindle 6 results in each case from the diameter of the storage disk 12.

The in the Figure 4 illustrated embodiments of a double-twisting or Kablierspindel 1 differ in particular from in the FIGS. 1 and 2 illustrated embodiment of a double-twisting or Kablierspindel 1 by an additional adapter 22nd

This additional adapter 22 is disposed between the bottom of the pot 2 of the stationary protective pot 3 and the yarn discharge plate 13 of the spindle 6 and preferably rotatably connected to the protective pot 2.

By such an adapter 22, the distance a between the lower edge 20 of the storage disk 12 and the thread through the fifth During the twisting or Kablierprozesses tangent touch line 23 can be increased to up to 120 mm.

In the embodiment of a double-twisting or cabling spindle 1 with adapter 22, this area can either be open, as in the left half of the Figure 4 represented, or, as on the right half of the Figure 4 shown, by a conically shaped jacket piece 19, which is for example part of the pot bottom 2, to be bridged.

That is, the bottom of the pot 2 has in such an embodiment on its underside on a pointing down conical extension. The conical projection 19 starts preferably just below the touched by the thread 5 during the twisting or Kablierprozesses, formed for example by a guide ring 17 contact line 23 and ends just above the thread-Abwurftellers 13 of the rotatably mounted spindle. 6

Of course, it is also possible to increase the above-described distance a between the lower edge 20 of the storage disk 12 and the contact line 23 touched by the yarn 5 during the twisting or cabling process up to 120 mm, without an additional, fixable on the protective pot adapter is used.

In such a case, for example, the protective pot can simply be enlarged by the length of an adapter downwards.

Also in the embodiments according to Figure 4 are in the range of the thread 5 during the twisting or Kablierprozesses tangent line of contact 23 different configurations possible.

The area of the contact line 23 can be either, for example, as on the left side of FIG Figure 4 be defused by a thread-friendly circumferential radius R, or, as shown on the right side of the Figure 4 indicated in the area of Touch line 23 is a guide ring 17 and a guide bead installed.

The Figure 5 shows a double-twisting or Kablierspindel 1 with a stationary protective pot 3, which is formed below the tangential by the thread 5 during the twisting or Kablierprozesses contact line 23, in the region preferably a guide bead or a guide ring 17 is arranged conical.

In such a partially conical shaped protective pot 3 can advantageously, that is, taking advantage of the maximum recording volume, both, as on the left half of the Figure 5 indicated, conical feed bobbins 4A are stored, as well as biconical feed bobbins 4B, as shown on the right half of the picture.

Claims (12)

1. Two-for-one-twisting or calibrating spindle (1) with a feed bobbin (4) mounted on a cap base (2) of a stationary protective cap (3) as well as a spindle (6) arranged below the protective cap (3) which guides a yam (5) to be processed during the twisting or calibrating process, wherein the spindle (6) is rotatably mounted by means of a lower bearing device (7) in a bearing housing (9) which can be fixed to a spindle rail (8) and a further, upper bearing device (11) is provided for mounting the stationary protective cap (3),
   characterised in that
   the largest diameter (d) of the rotatably mounted spindle (6) is at least 10% below the diameter (D) of the contact line (23) of the cap base (2) of the stationary protective cap (3) with the yarn (5).
2. Two-for-one-twisting or calibrating spindle according to claim 1, characterised in that the spindle (6) comprises a storage disc (12), on the peripheral face of which the yarn (5) to be processed is temporarily guided during the twisting or calibrating process.
3. Two-for-one-twisting or calibrating spindle according to claim 1, characterised in that the spindle (6) comprises a storage disc (12) as well as a yam discharge plate (13) connected to the storage disc (12).
4. Two-for-one-twisting or calibrating spindle according to claim 3, characterised in that the yam discharge plate (13) has a curved edge area (14), which revolves with play during the twisting or calibrating operation in an annular recess (15) open at the bottom of the cap base (12) of the protective cap (3).
5. Two-for-one-twisting or calibrating spindle according to claim 1, characterised in that the cap base (2), on its outside (16) along which the yarn (5) slides during the twisting or calibrating process, has a friction-friendly deflection radius (R), which is between 8 and 20 mm.
6. Two-for-one-twisting or calibrating spindle according to claim 1, characterised in that an adapter (22) is arranged below the protective cap (3).
7. Two-for-one-twisting or calibrating spindle according to claim 6, characterised in that the adapter (22) is gripped over by a conical casing piece (19) extending up to the discharge plate (13) and arranged on the cap base (2).
8. Two-for-one-twisting or calibrating spindle according to claim 1, characterised in that the protective cap (3) below the contact line (23) has a conical area (21), which allows the optimal mounting of conical (4A) or biconical (4B) feed bobbins in the protective cap (3).
9. Two-for-one-twisting or calibrating spindle according to claim 1, characterised in that the protective cap (3) is provided in the region of the contact line (23) with a guiding ring or a guiding bead (17), along which the yam (5) slides during the twisting or calibrating process.
10. Two-for-one-twisting or calibrating spindle according to claim 9, characterised in that the guiding ring or the guiding bead (17) is secured onto the cap base (2) of the protective cap (3).
11. Two-for-one-twisting or calibrating spindle according to claim 9, characterised in that the guiding ring or the guiding bead (17) is secured in the lower part of the cap casing surface (18) of the protective cap (3).
12. Two-for-one-twisting or calibrating spindle according to any one of the preceding claims, characterised in that a spacing (a), which is between 1 and 120 mm, is provided between the contact line (23) and the lower edge (20) of the storage disc (12).

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