US20190144236A1

US20190144236A1 - Sleeve for Winding with a Roving

Info

Publication number: US20190144236A1
Application number: US16/248,209
Authority: US
Inventors: Petr Haska; Jiri Stech; Christian Griesshammer
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2017-03-14
Filing date: 2019-01-15
Publication date: 2019-05-16

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.

Description

RELATED APPLICATION

The present application is a Continuation-in-Part (CIP) Application of U.S. application Ser. No. 15/919,323, filed Mar. 13, 2018, which claims priority to Swiss Application No. 00303/17, filed Mar. 14, 2017.

TECHNICAL FIELD

The present invention relates to a sleeve for winding with a roving, wherein the sleeve has an elongated sleeve body with two end faces, wherein the sleeve body has a contact region intended for contact with a roving, and wherein the contact region is formed at least predominately by a paper layer.

BACKGROUND

Generic sleeves are known in the state of the art and are always used when a roving must be wound on a textile machine, for example, a flyer. A corresponding sleeve is described in CH 681980 A5, for example. Roving (another name: slubbing) is a fiber composite in which at least some of the fibers are wound around an inner core. This type of roving is characterized in that it can still be stretched, despite having a certain strength sufficient to convey the roving to a downstream textile machine. The roving can thus be drawn with the help of a drawing device, for example, the drawing mill of a textile machine that processes the roving, for example, a ring spinning mill, before it is finally spun to yield a traditional yarn.
In principle, the sleeves have an elongated, preferably cylindrical sleeve body which has an upper and a lower end face. The sleeve body may be provided with an insert and/or attachment in the area of one or both end faces. For example, there may be a lower insert or attachment, by means of which the sleeve can be held in a rotationally fixed manner during winding with roving in or on a sleeve holder of a spinning mill or a winding machine. The insert or attachment may have recesses and/or bulges, for example, to permit a form-fitting or force-locking connection to a sleeve holder.
In the area of the upper side of the sleeve, there may be an insert or attachment by means of which the sleeve can also be held in a form-fitting or force-locking manner. The insert or attachment has an undercut, i.e., the inside diameter is enlarged in comparison with the end of the sleeve with an increase in the distance from the end of the sleeve so that a first section with an axial length of approx. 30 mm is provided as a cylindrical opening. A corresponding hold may be necessary either in winding of the sleeve or in conveyance thereof, wherein the insert or the attachment may have an opening for engagement of a so-called Casablanca holder, for example. Alternatively, the undercut may be shaped out of the sleeve material itself without using an insert or an attachment.
The aforementioned inserts and attachments may be made (at least partially) of plastic or metal, for example, wherein a biodegradable plastic is preferably used.
In any case, it is provided that the sleeve body has an outer contact region which is intended for contract with a roving which is formed at least largely, preferably completely by a paper layer, wherein the paper layer may also comprise multiple layers and may thus have several layers of paper. In addition, a capture region is provided for gripping one end of the roving with a capture structure. This is a defined ring-shaped region with an axial length of 2 to 50 mm on the sleeve with a surface property, which permits entrainment of the roving on the empty sleeve. The capture structure may also be formed by a surface having an adequate roughness, for example, by a brush pile, by application of sand or corundum, by embossing or by cutting into the upper paper layer. Alternatively, the roving fixation may be accomplished by suction on a perforated surface provided for this purpose.
The term “paper” is understood to be a flat material consisting essentially of fibers, preferably fibers of plant origin, and is formed by dehydration of a fiber suspension on a screen, wherein the resulting fiber nonwoven is then compacted and dried. Paper is usually produced from cellulose or wood pulp (e.g., ground wood pulp).
Moreover, the term “paper” in the present case also includes paper, which has a relatively high grammage and is also referred to as paperboard or cardboard, wherein the sleeve is held in the predetermined sleeve shape with the aid of adhesive materials or other compounds, regardless of the precise type of paper. Any other bonding or attachment may be accomplished by pressing individual layers of paper, for example.
In principle, there is the need with sleeves for the roving wound onto the sleeve not to slip off of the sleeve during winding of the sleeve or the subsequent transport, wherein this is usually achieved more or less well by the choice of a paper with a suitable surface roughness. It is also necessary to ensure that the roving remains adhering to the surface forming the contact region at the start of the winding operation in the aforementioned contact region in order to form the beginning of the roving body that is subsequently formed on the sleeve. For this purpose, so-called brush pile is used, for example, and should ensure entanglement of the roving and therefore a form-fitting hold.

SUMMARY OF THE INVENTION

An object of the present invention is to improve upon the known sleeves in order to accomplish the aforementioned requirements easily and with a long-lasting effect. Additional objects and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention.
According to the invention, it is now provided in a first alternative that the paper layer is processed mechanically on its surface forming the contact region in at least some sections in order to establish the desired roughness and to prevent the roving from slipping off the sleeve. The contact region is therefore not formed by smooth paper. It is provided instead that the paper layer is altered mechanically in at least some sections in the region of its surface forming the contact region for the roving, either at the time of production of the sleeve body or following this production, so that the surface ultimately has a defined surface structure with a greater roughness than the paper that has not been processed mechanically.
It is advantageous in this context if the paper layer has a roughened structure created by mechanical action in at least some sections. The structure may be created, for example, by the action of a tool which brushes the surface or processes the surface by scraping it. Other mechanical treatments of the paper layer, which cause damage and/or injury to the surface structure of the paper layer, are also conceivable. In any case, the mechanical treatment of the paper layer should take place in such a way that its surface roughness is greater in the region of the surface that has been treated accordingly than it was prior to the treatment.
It is also advantageous if the paper layer has incisions on its surface in at least some sections forming the contact region. In this case, the surface structure is created with the help of cutting tools, but, here again, the incisions can be created before, during or after the creation of the sleeve body. The incisions are preferably made in such a way that the surface has a zigzag pattern defined by the incisions, so that the roving can easily become entangled with the paper layer in this area. In particular, this type of surface structure could be present only in a subsection of the surface forming the contact region in order to force the adhesion of one end of the roving at the start of the winding operation.
With this specific embodiment, it is advantageous in particular if the paper layer has incisions, which have a positive wedge angle in at least some sections on their surface forming the contact region, i.e., the protruding parts are inclined in the direction of rotation of the sleeve. The wedge angle is the angle between the perpendicular to the surface of the sleeve and that to the protruding parts.
The contact region in particular could have a scaly surface structure in at least some sections.
Alternatively or in addition to the mechanically created structure mentioned above, it is also possible for the paper layer to be provided with an additive that increases the roughness of the surface on the inside and/or on the surface forming the contact region.
The additive may be applied to the aforementioned surface with adhesive, for example. In any case, only a portion of the contact region should be provided with the additive and the rest of the region is formed by the paper layer. The additive is thus preferably not applied to the full surface area.
The additive may also be embedded in the paper layer, and this can already take place during the production of the paper layer or production of the sleeve. Due to this additive, the paper layer develops tiny bulges, which cause the roughness of the contact region to be greater than that without the additive.
Special advantages are achieved when the additive is a bulk material. For example, sand or plastic granules may be used as the bulk material. The particles of the bulk material should have a maximum dimension of 0.05 to 1.0 mm and may have a spherical or oval shape or may be in the shape of rods, chips, fibers or thread pieces or even a shape having points and/or edges.
It is also advantageous if the additive is covered by an outer layer of paper which forms the contact region. In this case the sleeve has one or more inner paper layers onto or into which one or more different bulk materials are applied and/or introduced. These paper layers as well as the bulk material are ultimately enclosed in one or more additional paper layers, so that, although the bulk material is invisible from the outside, it still imparts a rough surface structure to the sleeve.
In another specific embodiment, it is possible to provide that, in the production of the sleeve body, the paper layer has on its surface a surface structure created by overlapping individual layers of paper which forms the contact region. The paper layer thus comprises multiple paper layers, which are preferably glued to one another and which are placed at least partially over one another in the production of the sleeve body and are secured in position. For example, the sleeve body is produced by winding one or more paper layers onto a support body which is to be removed again later.
In addition, it is advantageous if the surface structure created by overlapping individual layers of paper in the production of the sleeve body has a diamond pattern. In this case, the sleeve has multiple paper layers, which in turn have different slopes with respect to a longitudinal axis of the sleeve. Alternatively, other patterns, e.g., wavy patterns or patterns consisting of rectangular, in particular square or triangular basic patterns are also conceivable. The surface structure may also consist of various basic patterns.
It is also advantageous if the sleeve body is designed to be cylindrical at least in the contact region intended for contact with the roving, wherein the outside diameter in the aforementioned contact region has a minimum amount and a maximum amount, the minimum amount being max. 2.0 mm smaller than the maximum amount. Thus, despite the increased roughness of the contact region in comparison with the traditional sleeve, it is ensured that the diameter, which is not identical in all locations, for example, due to the mechanical processing of the surface or due to the aforementioned bulk material, does not result in the roving being wound onto the sleeve with a significant fluctuation in the tensile stress.
Alternatively, the sleeve may of course also have a truncated conical shape.
It is advantageous if the contact region intended for contact with the roving has surface regions with a surface structure that deviates from the others. For example, a surface structure which serves as a capture structure for one end of the roving could be provided in the area of one of the end faces, while the remaining contact region prevents the roving from slipping in the direction of the longitudinal axis of the sleeve.
It is also advantageous if a guide sleeve is inserted between the attachment and the undercut. Such a guide sleeve has a smaller inside diameter than the attachment mounted on the front end, so that stable support can be achieved on conventional conveyance means such as peg trays. It is also conceivable for the sleeve and the guide sleeve to be manufactured as a one-piece component.
It is advantageous if the axial length of an inside diameter determined by the undercut is defined by means of a spacer sleeve. The axial length is between 5 and 100 mm, with the inside diameter being 25 mm. The spacer sleeve may additionally serve as a spacer between the guide sleeve and an insert provided with an undercut. This permits a simple structural design of the sleeve.
At any rate, the present invention creates a sleeve which can be manufactured easily and inexpensively and therefore can serve as a single-use solution. For example, it would be conceivable for the sleeve to be wound with a roving at a location (for example, a spinning station that produces traditional rovings), such that the wound sleeve is conveyed to a different location (for example, a spinning mill or a weaving mill) and disposed of there after unwinding the roving. The conveyance of unwound sleeves back to the site of origin thus becomes unnecessary.

BRIEF DESCRIPTION OF THE FIGURES

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

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

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

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

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.
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.
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.
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.
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).
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).
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.
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.
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 α, 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 α 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.
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.
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

1 sleeve
2 roving
3 sleeve body
4 end face
5 contact region
6 additive
7 structure
8 cut
9 paper layer
10 diamond pattern
11 insert
12 attachment
13 bulge
14 capture structure
15 opening
16 guide sleeve
17 spacer sleeve
18 undercut
19 direction of rotation of sleeve 1
α wedge angle of a cut 8

Claims

What is claimed is:

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.