JPH01127573A - Tube cup and manufacture thereof - Google Patents

Abstract

PURPOSE: To make faultless tube cop weaving possible by providing a cop end and an extension part held to the other cop end by winding so as to stop, and providing the extension part with a holding pivot having a snap fixing element coaxially with an extended cone with a ring stage. CONSTITUTION: A tube cop is provided with a cop end 1 for pulling out woof 17, and an extension part 3 wound around the other cop end 2 and held to stop. This extension part 3 is provided with an extended cone 4 with a retrorse inclined ring stage, and a holding pivot 5 having a ring groove and coaxially protruded outward. A plurality of metal snap rings 6 with slits on single sides are inserted in the ring groove. The tube cop is wrapped with a jacket cover 7 formed of sufficiently rigid plastic and contraction-fitted, and a narrow reinforcing band 8 with a large number of reinforcing threads 9 extended in a longitudinal direction is stuck onto the jacket cover 7. The reinforcing band 8 reinforces against the deformation of the cover 7 of the tube cop fitted into a shuttle so as to serve for stabilization.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to Schlauchkops, in particular made of synthetic or glass fiber yarns, and to a method for their production.

Tubular tips made of coarse natural fiber yarns, such as shoots, coconut fibers, sisal, asbestos and coarse woolen yarns, have been known for a long time. Due to the slight stiffness and surface properties of their threads, and the torsional adhesion thereby enhanced, they are sufficiently self-supporting, and in the trough of the shirttle, the brush ears, toothed It is held on its outer periphery by rails or stripes, and thread withdrawal takes place on the inside, respectively.

Because of the difficulties associated with retaining the tube tip in the shuttlecock, shirttles were often equipped with a wire or thin plate cover to prevent the tip from flying out. For this reason, tubular taps were mainly used only for the production of undemanding textile products, such as rags, coconut fiber mats or very coarse woolen fabrics.

With the advent of synthetic threads, tube-cutting became virtually meaningless.

However, because tubecots have a much larger yarn capacity than a yarn reel with the same external dimensions, tubecots have been developed to be suitable for special applications, such as the production of endlessly woven paper machine overlays. Various attempts have been made to extend the usage time of the tubular spout forming the weft yarn stock in the shirttle. However, these attempts did not lead to the desired results. This does not tolerably prevent undesired displacements and premature collapse of the tubular tip during the shuttlecock, and uncontrollable ballooning when pulling the weft yarn from the internal cone of the tubular tip can further cause failures. This is because of this. It has also not been possible to achieve a sufficiently reliable automatic exchange of tube cups in the shuttlecock.

The object of the present invention is to provide an improved tube-cop weaving made in particular of synthetic or glass-fiber yarns, which avoids the drawbacks of the prior art and which allows for a simple and virtually fault-free tube-cop weaving, as well as a reliable automatic tip change. The goal is to create a manufacturing method to do so.

To solve this problem, a tubular tip of the type mentioned at the outset has the features of claim 1.

With a coaxially projecting retaining pivot with an extension tied to the end of the tube, this tube tip can be quickly and reliably replaced by the tube tip changing device described in the applicant's parallel European patent application of the same filing date. , so that it can be axially aligned and fixed in a snap fastening device placed in the trough of the shirttle.
The entire coppice spool, preferably wrapped in a tight-fitting jacket cover, is aligned without contact in the trough of the shirttle.

Advantageous further embodiments of this tubular tip are described in the claims 2 to 8.

Furthermore, the subject of the present invention is a method for producing a tube tip of this type by core-winding the tip thread according to the features of claim 9.

Preferred embodiments of the tube tip will be further described below with reference to the accompanying drawings.

The tubular tip shown in FIG. 1 has a conical lunocop end 1 intended for later external extraction, and an extension 3 held by wrapping around another tip 2, which extension The part 3 has an extension cone 4 with oppositely inclined ring steps and a retaining pivot 5 having a coaxially outwardly projecting substantially cylindrical circumferential surface and ring grooves arranged at equal intervals therein. A plurality of metal snap rings 6 with slits on one side are inserted into this ring groove, and these snap rings 6 protrude radially upwardly above the circumferential surface of the holding pivot 5. extension cone 4
At the end of the retaining pivot 5 facing towards, a radially outwardly projecting ring flange is arranged, which is separated from the ring stage of the extension cone 4 by a deeper ring groove. In addition, the tube tip can be used in a conventional manner.
It is provided with a penetrating hollow portion indicated by a dotted line in the figure, which is created when the core used during manufacturing is pulled out.

As is clear from FIG. 1, the tubular tip is further tightly wrapped by a shrink-fit jacket cover 7 made of sufficiently rigid plastic. Pasted onto the jacket cover 7 is a narrow reinforcing strip 8 with a number of reinforcing threads 9 running in the longitudinal direction in the illustrated embodiment. These reinforcing bands 8 serve to strengthen and stabilize the jacket cover of the tubular tip fitted into the shirttle against undesirable deformations. Instead of a pasted reinforcing strip 8, it is also suitable to embed the reinforcing strip in the jacket cover 7 itself.

In FIG. 2, a tube tip according to the invention is shown in its working position inserted into a trough 11 of a shuttlecock 10. At one end of the trough 11, a clamping device 12 is provided with laterally opposed spring-loaded clamping pawls 15, which in cross section are each curved in the form of an arc adapted to the diameter of the holding pivot 5. , is provided with a snap web on its inner surface, which, together with the snap ring 6 of the retaining pivot 5, serves to keep the tubular tips aligned in the trough 11 of the shuttlecock 10.

Furthermore, a thread brake 13 is arranged in the trough 11 of the shuttlecock 10 coaxially with the longitudinal axis of the tube stopper. During operation, the weft thread is pulled out of the conical outer surface of the tip end 1 and passes through the central opening at the end of the jacket cover 7;
In the axial direction of the yarn braking device 13 and from there the yarn feeding device 14
Run through.

In order to manufacture the tube tip according to the invention, the reusable extension 3 is inserted into its core in a conventional tip winder, the extension 3 is then tied tightly and a cylindrical tip spool is wound.

After the tube tip made in this way is taken out from the winding core of the tip winding machine together with the tip end 1 for external extraction, the tube tip is wrapped in plastic shrink foil, which is then used as a jacket cover 7 which is tightly fitted through the heat pipe. Shrinkage fit, at this time the tip end 1 is the weft 17
It remains as an outlet for extracting.

After the tip change, preferably carried out fully automatically, by pushing the holding pivot 5 into the clamping pawl 15 of the shirt tor 10, the shirt tor 1 passes through the thread braking device 13.
The weft thread 17 running through the straight longitudinal slit 16 and the threading device 14 branching from it is drawn out of the conical tip end 1 which is further wrapped in the jacket cover 7 and is then drawn out of the jacket with sufficient inherent stiffness. The cover 7 stabilizes the tube tip during tip changes and also during weft operations, and at the same time stabilizes the weft yarn 17 in the shirt handle 10.
helps avoid undesirable ballooning.

The tube tip described above using a preferred embodiment is maintained by an extension 3 with a coaxial retaining pivot 5 strapped to remain in the tip end 2 and a separate tip end 1 for external withdrawal. As long as it is true, it can be varied in various ways by those skilled in the art depending on the requirements of the individual case.

[Brief explanation of the drawing]

FIG. 1 shows a schematic perspective view of a tubular tip, and FIG. 2 shows a plan view of the tubular tip used in the shuttlecock according to FIG. , 2... Tip end 3... Extension part 4... Extension cone 5... Holding pivot 6... Snap fixing element (snap ring, snap web) 7... Jacket cover 8... Reinforcement Obi 9...
° Thread (reinforcing thread) 10... Shirttle 12
...Tightening device diagram 1

Claims (12)

[Claims] (1) A tube cup, in particular made of synthetic fiber thread or glass fiber thread, with a cup end (1) for external withdrawal and an extension cone (4) wrapped in thread, preferably with a ring groove or ring step. and shuttle (1
a retainer coaxially projecting from the cup end (2) with a preferably circumferentially running snap fastening element (6) for axially aligned and fixing the tube cup to the clamping device (12) in the clamping device (12) in the cup end (2); A tube cup characterized by an extension (3) held on another cup end (2), with a pivot (5). (2) A tube cup according to claim 1, characterized in that there is a jacket cover (7) with a slight wall thickness that tightly encloses the tube cup. (3) A tube cup according to claim 2, characterized in that the jacket cover (7) consists of a plastic shrink foil of sufficient inherent stiffness. (4) characterized in that the jacket cover (7) is provided with at least one reinforcing band (8) running approximately in the axial direction;
A tube cup according to claim 2 or 3. (5) Tube cup according to claim 4, characterized in that the jacket cover (7) is provided with at least one applied reinforcing strip (8). (6) Any one of claims 2 to 5, characterized in that the jacket cover (7) or the reinforcing band (8) has threads (9) or fibers running approximately in the axial direction. The tube cup described in . (7) one of claims 1 to 6, characterized in that the retaining pivot (5) is provided with a plurality of snap webs (6) and/or snap grooves running in the circumferential direction; The tube cup described in . (8) The extension (3) is made of plastic and the retaining pivot (5) is provided with a plurality of preferably slit metal snap rings (6). The tube cup described in any one of Items 7 to 7. (9) A method for manufacturing a tube cop according to any one of claims 1 to 8 by winding a cop thread around a winding core, preferably with a circumferential groove or A prefabricated extension (3) with a ring-stepped extension cone (4) and a coaxially projecting retaining pivot (5) is inserted over the winding core and the tightly tied extension (3)
) and a preferably conically shaped cup end (1) for external withdrawal. (10) The tube cup is furthermore closely wrapped with a jacket cover (7) of a flexible sheet material of a small wall thickness, preferably of plastic shrink foil. the method of. (11) Reinforcement strip (8) running in the longitudinal direction of the tube cup;
11. Method according to claim 10, characterized in that a sheet material is used, preferably with embedded threads. (12) A separately produced reinforcing band (8) is pasted on the jacket cover (7) in the axial direction;
A method according to claim 10.