Sleeve for Winding with a Roving

Abstract

A sleeve for winding a roving thereon includes an elongated sleeve body with opposite upper and lower end faces. A contact region is defined on the sleeve body to contact the roving and includes a paper layer. A capture structure is defined within the contact region and is configured to grip an end of the roving wound onto the sleeve body. The paper layer includes a surface structure of one or more of: a mechanically processed surface roughness section in the contact region; an additive in the contact region that increases surface roughness of the contact region; or a surface structure comprising overlapping individual paper layers forming the contact region.

Claims

1. A sleeve for winding a roving thereon, the sleeve comprising: an elongated sleeve body with opposite upper and lower end faces; a receptacle on the upper end face defined by an undercut; an attachment on the lower end face configured to fixedly hold the sleeve for rotation; a contact region defined on the sleeve body to contact the roving wound onto the sleeve body, the contact region comprising a paper layer; a capture structure defined within the contact region and configured to grip an end of the roving wound onto the sleeve body; and wherein the paper layer comprises a surface structure of one or more of: a mechanically processed surface roughness section in the contact region; an additive in the contact region that increases surface roughness of the contact region, the additive located on an outer surface of the paper layer or within interior layers of the paper layer; or a surface structure comprising overlapping individual paper layers forming the contact region.

2. The sleeve according to claim 1, wherein the paper layer comprises a roughened structure on an outer surface thereof created by mechanical action in at least some sections of the contact region.

3. The sleeve according to claim 1, the paper layer comprises surface cuts in at least some sections of the contact region.

4. The sleeve according to claim 3, wherein the cuts are defined at a positive wedge angle (a) into the paper layer.

5. The sleeve according to claim 1, wherein the additive comprises a bulk material.

6. The sleeve according to claim 5, wherein the additive is covered by an outer layer of the paper layer paper in the contact region.

7. The sleeve according to claim 1, wherein the surface structure formed by the overlapping paper layers comprises a diamond pattern.

8. The sleeve according to claim 1, wherein the surface structure of the paper layer is cylindrical at least in the contact region and comprises an outside diameter in the contact region that varies between a minimum amount and a maximum amount, wherein the minimum amount is at most 2.0 mm smaller than the maximum amount.

9. The sleeve according to claim 1, wherein the contact region comprises surface sections with different ones of the surface structures.

10. The sleeve according to claim 1, further comprising a guide sleeve inserted between the attachment and the undercut.

11. The sleeve according to claim 1, further comprising a spacer sleeve adjacent the undercut, the space sleeve having an axial length with an inside diameter defined by the undercut.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0029] Additional advantages of the invention are described in the following embodiments, in which schematically:

[0030] FIG. 1 shows a longitudinal section through a sleeve wound with rovings according to the invention; FIG. 2a, b show possible surface structures of a sleeve according to the invention; FIG. 3a shows a longitudinal section through a sleeve according to the invention; FIG. 3a shows a detail of the contact region of a sleeve according to the invention; and

[0031] FIG. 4 shows a cut into a sleeve with a positive wedge angle.

[0032] Only the features that are important for the invention are illustrated here. The same features are labeled with the same reference numerals in different figures.

DETAILED DESCRIPTION

[0033] Reference will now be made to embodiments of the invention, one or more examples of which are shown in the drawings. Each embodiment is provided by way of explanation of the invention, and not as a limitation of the invention. For example features illustrated or described as part of one embodiment can be combined with another embodiment to yield still another embodiment. It is intended that the present invention include these and other modifications and variations to the embodiments described herein.

[0034] FIG. 1 shows a longitudinal section through a sleeve 1 according to the invention, which is already wound with roving 2. The sleeve 1 has a sleeve body 3 which is designed to be cylindrical in the present case and has an upper and a lower end face 4. To be able to induce a rotational movement in the sleeve 1 with the help of a sleeve holder (not shown) of a spinning mill or a winding machine, the sleeve 1 has an attachment 12 in the area of the lower end face 4 which has an opening 15 as well as one or more bulges 13 in order to be able to form a form-fitting connection between the attachment 12 and a sleeve holder of a winding machine or spinning mill.

[0035] In the area of the upper end face 4, an insert 11, which also has an opening 15 as well as an undercut 18, is present in order to insert a supporting structure into the sleeve 1 and be able to raise the sleeve 1 thereby and transport it. The insert 11, as well as the attachment 12, may be made of a plastic. In any case the sleeve body 3 consists of a paper layer 9 having one or more paper layers so that the sleeve body 3 can be simply recycled.

[0036] To now prevent the roving 2 which is on the sleeve 1 from slipping off the sleeve 1 while additional roving 2 is being wound onto it or during the transport or the storage of a wound sleeve 1, it is proposed in a first variant according to the invention that the paper layer 9 should be processed mechanically in at least some sections on its surface forming the contact region 5.

[0037] For example, it is conceivable that the paper layer 9 will have a mechanically produced structure 7 as shown in FIG. 2a, e.g. it may have a diamond pattern 10. Likewise other patterns are of course also conceivable. In general, however, the structure 7 should be only a few hundredths to a few tenths of a millimeter deep so that the outside diameter of the sleeve body 3 is essentially the same over the entire longitudinal extent in the contact region 5. Alternatively a corresponding surface structure may of course also be achieved by having the paper layer 9 consist of multiple paper layers which have been wound in different alignments with the sleeve body 3 (second variant).

[0038] FIG. 2b shows that the contact region 5 may also have several sections with a different surface structure. For example, it would be conceivable for the sleeve body 3 to have a structure 7 in the upper region, which serves as a capture structure 14 for gripping one end of the roving at the start of the winding process. The capture structure 14 thus lies within the contact region 5. The remaining section of the contact region 5 may have a different structure 7 or, as shown in FIG. 2b, for example, may also be provided with an additive 6 (for example, sand or plastic granules) to increase the roughness of the contact region 5 and to prevent the roving 2 from slipping down (third variant).

[0039] A longitudinal section through a corresponding embodiment is shown in FIG. 3a. As can be seen there, the paper layer 9 is provided with a spherical additive 6, which is glued into and/or onto the paper layer 9, for example.

[0040] Finally the desired roughness of the contact region 5 may also be implemented by cuts 8 in the surface of the sleeve body 3. The resulting patterns in the surface are shown in FIG. 3b merely as an example. Of course almost any patterns are conceivable here because the patterns depend only on how a corresponding cutting tool processes the surface of the paper layer 9. The surface structure is preferably in the form of hooks or scales, because these patterns can be especially effective in preventing slippage of the roving 2.

[0041] With this embodiment, it is advantageous in particular if the paper layer has cuts 8 on at least some sections of its surface forming the contact region, wherein these cuts have a positive wedge angle , i.e., the protruding parts coming out of the surface are inclined in the direction of rotation 19 of the sleeve 1. As shown in FIG. 4, the wedge angle is the angle between the perpendicular to the surface of the sleeve 1 and the protruding part of a cut 8. FIG. 4 shows a section through a sleeve 1 from above.

[0042] Finally, FIG. 1 shows that, in addition or as an alternative to the aforementioned inserts 11 and/or attachments 12, additional functional sections may be present. For example, the sleeve 1 shown in FIG. 1 comprises a round guide sleeve 16 (for receiving a sleeve holder, for example, in the form of a so-called peg tray) as well as a spacer sleeve 17, which is also round and ensures the desired spacing between the upper insert 11 and the guide sleeve 16. Both the guide sleeve 16 and the spacer sleeve 17 may be made of paper and may be glued in the sleeve body 3.

[0043] The present invention is not limited to the exemplary embodiments illustrated and described here. Modifications are possible within the scope of the patent claims as well as there may be any combination of the features described here even if they are illustrated and described in different parts of the description and/or claims or in different embodiments, assuming that the combination does not result in a contradiction with the teaching of the independent claims.

LIST OF REFERENCE NUMERALS

[0044] 1 sleeve [0045] 2 roving [0046] 3 sleeve body [0047] 4 end face [0048] 5 contact region [0049] 6 additive [0050] 7 structure [0051] 8 cut [0052] 9 paper layer [0053] 10 diamond pattern [0054] 11 insert [0055] 12 attachment [0056] 13 bulge [0057] 14 capture structure [0058] 15 opening [0059] 16 guide sleeve [0060] 17 spacer sleeve [0061] 18 undercut [0062] 19 direction of rotation of sleeve 1 [0063] wedge angle of a cut 8