EP0471353B1 - Shrink bobbin - Google Patents

Abstract

In the shrink bobbin, especially for smooth filament yarn, having a rotationally symmetrical body which possesses a casing forming a supporting surface for the yarn and having supporting webs (5, 6) extending in the longitudinal direction between end rings (1, 2) and supported circumferentially against one another via deformable shrinkage elements (8), its deformation is dependent on the residual shrinkage of the material to be processed and builds up flexibly to maximum shrinkage. The yarn package is thus not deformed, and a direct processing of the wound yarn is possible. The supporting webs (5, 6) are connected directly to the end rings (1, 2). Arranged between the supporting webs (5, 6) are stay webs (7) which extend essentially in the circumferential direction and the ends of which are each supported on a supporting web (7) via respective deformable shrinkage elements (8). <IMAGE>

Description

The invention relates to a shrink sleeve, in particular for smooth filament yarn, with a rotationally symmetrical body which has a jacket forming a supporting surface for the yarn with supporting webs which are supported in the longitudinal direction between end rings and are supported against one another in the circumferential direction via deformable shrink elements (see, for example, DE-A-3128943 ).

The object of the present invention is to design a shrink sleeve of the type mentioned at the outset in such a way that its deformation is based on the residual shrinkage of the material to be processed, in particular a smooth filament yarn, and is flexibly expanded to the maximum shrinkage. The yarn package should not be deformed, so that a direct processing of the wound yarn is possible.

This object is achieved according to the invention in a shrink sleeve of the type mentioned at the outset in that the support webs are connected directly to the end rings, that support webs extending essentially in the circumferential direction are arranged between the support webs, the ends of which are each supported on a support web via deformable shrink elements.

The shrink sleeve is deformed as a function of the residual shrinkage still present in the material to be processed. The yarn package is retained in its shape, so that after shrinking the yarn can be easily unwound directly from the shrink sleeve and processed further.

The shrink sleeve according to the invention can also be designed so that the support webs each form a ring lying in a radial plane.

The shrink sleeve according to the invention can also be designed such that the support webs are rigidly connected to at least one support web in the region of their longitudinal center. This makes the construction of the shrink sleeve particularly stable without interfering with the radial flexibility.

The shrink sleeve according to the invention can also be designed in such a way that the support webs which follow one another in the circumferential direction are connected alternately with support webs exclusively rigidly or exclusively via shrink elements.

The shrink sleeve according to the invention can also be designed so that the shrink elements are bow-shaped, are supported with their legs on a supporting web and are connected to a supporting web in the central region of a transverse web. The shrinking elements are preferably U-shaped, V-shaped or curved.

The device according to the invention can also be designed in such a way that the shrink elements are provided with shrink-limiting elements which cooperate with the associated supporting web during radial compression. The extent to which the shrink sleeve can be maximally compressed can thus be precisely defined.

The shrink sleeve according to the invention can also be designed such that the supporting webs have a reduced cross section at their two ends adjoining the end rings. As a result, the deformation at the transition between the end rings on the one hand and the supporting webs on the other hand is facilitated and assigned to a specific area of the supporting webs.

The shrink sleeve according to the invention can also be designed such that the outer surfaces of the supporting webs at their two ends adjoining the end rings fall radially inward in the direction of the end rings. The radial compression reduces the inclination initially present in the wing near the end rings and dismantled. This prevents slipping in the edge zones of the yarn package.

The shrink sleeve according to the invention can also be designed such that space is provided at least on an end ring for receiving a thread reserve.

finally, the shrink sleeve according to the invention can be designed such that the end ring located at one end of a first winding support can be at least partially inserted into the end ring located at the other end of a second winding support. In this way, the required stacking and transport space is significantly reduced.

Fig.1

eine Seitenansicht - teilweise geschnitten - einer ersten Ausführungsform der erfindungsgemäßen Schrumpfhülse in Ausgangsposition,

Fig. 2

einen Schnitt nach der Linie 2-2 in Fig. 1,

Fig. 3

eine Seitenansicht - teilweise geschnitten - der ersten Ausführungsform der erfindungsgemäßen Schrumpfhülse in maximal komprimierter Position,

Fig. 4

einen Schnitt nach der Linie 4-4 in Fig. 3,

Fig. 5

eine Seitenansicht - teilweise geschnitten - einer zweiten Ausführungsform der erfindungsgemäßen Schrumpfhülse in Ausgangsposition,

Fig. 6

einen Schnitt nach der Linie 6-6 in Fig. 5,

Fig. 7

eine Seitenansciht - teilweise geschnitten - der zweiten Ausführungsform der erfindungsgemäßen Schrumpfhülse in der maximal komprimierten Position,

Fig. 8

einen Schnitt nach der Linie 8-8 in Fig. 7,

Fig. 9

eine Teilansicht der Tragfläche der erfindungsgemäßen Schrumpfhülse mit V-förmig ausgebildeten Schrumpfelementen in Ausgangsposition und

Fig. 10

eine Teilansicht der Anordnung gemäß Fig. 9 in maximal komprimierter Position.

In the following part of the description, some embodiments of the shrink sleeve according to the invention are described with reference to drawings. It shows:

Fig. 1

a side view - partially cut - of a first embodiment of the shrink sleeve according to the invention in the starting position,

Fig. 2

2 shows a section along line 2-2 in FIG. 1,

Fig. 3

2 shows a side view - partly in section - of the first embodiment of the shrink sleeve according to the invention in the maximum compressed position,

Fig. 4

a section along the line 4-4 in Fig. 3,

Fig. 5

a side view - partially cut - a second embodiment of the shrink sleeve according to the invention in the starting position,

Fig. 6

a section along the line 6-6 in Fig. 5,

Fig. 7

a side view - partially cut - of the second embodiment of the invention Shrink sleeve in the maximum compressed position,

Fig. 8

7 shows a section along the line 8-8 in FIG. 7,

Fig. 9

a partial view of the wing of the shrink sleeve according to the invention with V-shaped shrink elements in the starting position and

Fig. 10

a partial view of the arrangement of FIG. 9 in the maximum compressed position.

The embodiment of the shrink sleeve according to the invention shown in FIGS. 1-4 has a lower end ring 1 and an upper end ring 2. The lower end ring 1 can be inserted into the upper end ring 2 of an axially adjacent winding carrier. The upper end ring 2 has a lateral surface 3 and is provided with a thread reserve groove 4.

There are supporting webs 5, 6 running parallel to the axis of the winding support, each of which connects at their ends to the lower end ring 1 or the upper end ring 2.

In the circumferential direction, support webs 5 and support webs 6 alternate, the support webs 5 being rigidly connected to support webs 7, which run in the circumferential direction and extend on both sides by the same amount beyond a support web 5. The ends of the support webs 7 facing away from the respective support web 5 are centrally connected to flexible, arched shrink elements 8 which are connected at their two ends 9 to a support web 6. With the exception of the connection of the shrinking elements 8, the supporting webs 6 are designed in the same way as the supporting webs 5.

The shrinking elements 8 are provided with shrinkage limiting elements 10, which in the starting position (FIG. 1) are at a distance from the associated supporting web 6. The distance between the shrinkage limiting elements 10 and the associated one Support web 6 defines the dimension by which the circumference of the shrink sleeve can be reduced as much as possible.

In the exemplary embodiment, the support webs 7 form a ring lying in a radial plane in the circumferential direction with the interposition of the shrinking elements 8 and the support webs 6. Wreaths of this type are distributed equidistantly over the height of the shrink sleeve.

The outer surfaces of the support webs 5, 6 define a support or winding surface for the yarn to be picked up. This wing falls in the starting position of the shrink sleeve (Fig. 1) near the end rings 1, 2 radially inward, thus forming a conical surface 11 inclined towards the respective end limited by a shoulder 13 in the area of the upper end ring.

If now on a shrink sleeve according to FIG. 1, a yarn, for. B. a filament smooth yarn is wound with residual shrinkage, then the shrinkage of the yarn leads to the deformation of the shrink sleeve from the starting position shown in Fig. 1 in the shrunk position shown in Fig. 3. In this position, the support or wrapping surface is essentially cylindrical. The arcuate shrink elements are pressed in in their central area, and the shrinkage limiting elements 10 rest on the support webs 6.

The radial wall thickness of the supporting webs 5 and 6 is increasingly reduced in the area of the corneal surfaces 11 in the direction of the respective end ring in order to facilitate the deformation of the supporting webs 5, 6 in this area. This prevents slipping in the edge zones of the yarn package and enables subsequent direct processing.

The further embodiment of the shrink sleeve according to the invention shown in FIGS. 5-8 differs from the one described above only by the configuration of the shrink elements 8 Embodiment from. According to FIGS. 5-7, these shrinking elements 8 are U-shaped, that is to say they each have two legs 15 running parallel to one another and a transverse web 14 running parallel to the supporting web 6 in the starting position (FIG. 5) Support bridge 7 articulated.

9 and 10 show a further embodiment of the shrink sleeve according to the invention, which likewise only relates to the configuration of the shrink elements 8. Here, these shrinking elements 8 are V-shaped, that is to say they have legs 16 which are inclined towards one another in the direction of the connected supporting web.

In the illustrated exemplary embodiments, the shrinking elements 8 are each connected to a supporting web 6, while the supporting webs 5 are free from such shrinking elements. But it is also possible, for. B. alternately on one and the same supporting web 5, 6 in the axial direction shrink elements 8 and rigid connections with supporting webs 7 can follow one another.

The shrink sleeves according to the described embodiments can be manufactured from injection molded thermoplastic.

Reference list

1

lower end ring

2nd

upper end ring

3rd

Lateral surface

4th

Thread reserve groove

5

Supporting bridge

6

Supporting bridge

7

Landing stage

8th

Shrink element

9

The End

10th

Shrinkage limiting element

11

Conical surface

12th

Ring collar

13

shoulder

14

Crossbar

15

leg

16

leg

Claims (13)

1. Shrink bobbin, specifically designed for continuous filament yarn, with an axially symmetrical body with a sleeve forming a surface for the yarn and which has end bracing carriers (5,6) running longitudinally between end rings (1,2) circumferentially over deformable shrink elements (8), characterised in that the carriers (5,6) are held directly in the end rings (1,2), and that between the carriers (5,6) are circumferential supports (7) whose ends are supported by a carrier (6) via deformable shrink elements (8).
2. Shrink bobbin in accordance with claim 1, characterised in that the supports (7) each form a ring in the radial plane.
3. Shrink bobbin in accordance with claims 1 and 2, characterised in that the supports (7) are rigidly fixed to at least one carrier (5) approximately halfway along their length.
4. Shrink bobbin in accordance with one of the preceding claims, characterised in that the carriers (5,6) which follow one another circumferentially during rotation, are alternately exclusively rigidly connected to supports (7) or exclusively connected via shrink elements (8).
5. Shrink bobbin in accordance with one of the preceding claims characterised in that the shrink elements (8) are bow-shaped, that their shanks (15;16) rest on a carrier (6) and mid-way along a crosspiece (14) are connected to a support (7).
6. Shrink bobbin according to claim 4, characterised in that the shrink elements (8) are U-shaped.
7. Shrink bobbin according to claim 4, characterised in that the shrink elements (8) are V-shaped.
8. Shrink bobbin in accordance with claim 4, characterised in that the shrink elements (8) are bow-shaped.
9. Shrink bobbin in accordance with one of the preceding claims, characterised in that the shrink elements (8) are fitted with shrink limiters (10), which interact under radial compression with the associated carrier (6).
10. Shrink bobbin in accordance with one of the preceding claims, characterised in that the carriers (5,6) have a reduced cross-section at each of their ends at the point of connection to the end rings (1,2).
11. Shrink bobbin in accordance with one of the preceding claims, characterised in that the carrier (5,6) outer faces at each of their ends at the point of connection to the end rings (1,2) incline radially inwards towards the end rings (1,2).
12. Shrink bobbin in accordance with one of the preceding claims, characterised in that on at least one end ring there is space to take reserve yarn.
13. Shrink bobbin in accordance with one of the preceding claims, characterised in that the end ring at one end of a first creel can be at least partially inserted into the other end ring at the other end of a second creel.

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