DE3019320A1 - Yarn or thread coiler spool sleeve with thread pick=up slot - has at least two successive run-in and clamping areas positioned one behind other - Google Patents

Abstract

The spool sleeve (1) includes a thread pick up slot positioned on at least one end of the sleeve at a small distance from the front surface. The thread pick up slot extends over the whole circumference of the spool sleeve and within the thread pick-up slot there are several run in areas (3) and several clamping areas (4) positioned one behind the other. The lead from a run-in area to a clamping area is formed in the same way as the lead between a clamping area to a run in area. The object of this system is to produce a spool sleeve permitting the successful pick up of thread at very high spool speeds.

Description

Bobbin case

The present invention relates to a bobbin tube with a thread catching slot, the is arranged at least at one end of the sleeve on the circumference and made of a broad Inlet area and a narrow clamping area.

Such bobbins are required for winding threads or yarn with the help of winding machines. Their basic structure and the appropriate ones Areas of application are known, for example, from US Pat. No. 31 03,305. In this patent is also described how the thread is laid on while the winder is running With the help of a suction gun, the yarn is brought into the inlet area of the yarn catcher slot is then torn off when reaching the clamping area on the side of the Sauspistole to become. The thread to be wound initially forms a lost lap on the bobbin.

The thread is then mostly with the help of an auxiliary thread guide or the like to form a thread reserve deflected from this loss lap and then from the actual traversing thread guide added, the main winding process within controls his work area.

In the aforementioned US-PS 31 03 305 is at winding speeds of about 700 m / min a catch probability of 90 W is indicated, i.e. that -in the middle part -9 out of 10 attachment attempts a success was recorded straight away, so the thread could be caught in the narrow clamping area, the newly running thread on the bobbin was wound up while the other end of the thread was torn off at the clamping area or could be cut off if necessary. An unsuccessful attempt to put on means not only time and material loss that can be caused by the material collected in the suction gun no longer for textile purposes used, but often also the cause of a machine malfunction, as it leads to lap formation on the Drive rollers of the winding unit or on the groove rollers of the traversing device can come. It is also often observed that although the mooring was successful, However, that not all individual filaments are clamped in the clamping area of the thread catching slot became. In such a case, the thread fanned out, the lossy lap becomes unclean and extensive.

In such cases it is no longer possible to have properly trained eiq To produce thread reserve.

With an increase in winding speeds, especially in modern spinning machines, in which the winding units with surface speeds of more than 3000 m / min work, there was a strong decrease in the number of successful berthing attempts observed.

There has therefore been no lack of attempts, for example with special designed thread catching slots increase the likelihood of catching, even in high-speed spinning processes to increase again, i.e. also at the high winding speeds required there good success rates again when feeding the delivered yarn to the winding machine to obtain. For example, the following prior publications are mentioned here: US-PS 37 17 291, DE-GM 75 27 985 and DE-GM 76 25 081.

The special design of the catch slots can lead to a certain Increase in the likelihood of trapping, but this is still not considered sufficient is seen. Another way was in DE-OS 27 17 T89 and DE-GM 79 21 02-2 trodden. Here an attempt was made to reduce the likelihood of thread catching to increase that several on the circumference of the bobbin case are parallel to each other Thread catching slots were arranged or the thread catching channel the shape of a narrow winding spiral on the cylinder surface of the Has bobbin case. These variations were carried out in the hope that through a broadening the area in which the thread to be wound is caught on the bobbin can, the capture probability is increased. That is up to a certain point This is actually the case, unfortunately there are a number of disadvantages - tied together. Particular attention should be given to the handicap of an impeccable Preparing the thread reserve if the thread has been caught several times. Farther such a measure increases the risk that only single filaments of the thread are caught however, others are not, in no way corrected. In addition, mean parallel Lying or parallel displaced catch slots take up unnecessary space the bobbin tube, which is then missing to apply the thread reserve windings.

There was therefore still the task of creating a bobbin tube with thread catching slots to find a safe and successful threading of the yarn at high winding speeds A successful creation process is understood to mean in which not only the yarn or the thread is caught, but also in which a fraying of the thread resp.

looping is avoided.

Surprisingly, it has now been found that this task by a bobbin is solved, in which a thread catching slot at a small distance from one end face of the bobbin is arranged, which extends over the entire circumference of the bobbin case, wherein this thread catching slot alternately several wide inlet areas one behind the other and has several narrow clamping areas.

Due to the arrangement of several inlet areas and clamping areas one behind the other in a continuous thread catching slot near at least one end face the bobbin case can increase the success rate when donning, even at very high winding speeds and small sleeve diameter can be significantly improved.

In a preferred embodiment there are two wide inlet areas and two narrow clamping areas one behind the other on a circumferential thread catching slot the bobbin tube. The transition from the wide inlet area to the narrow clamping area should preferably be designed in the same way as the transition from narrow clamping area to wide inlet area. In this case it is the bobbin case Can be used for both directions of rotation. With the special design of the thread catching slot, both in the slot depth and width as well as in the division into inlet and The clamping area can be based on experience with prior art spool tubes be taken over in full. In a preferred embodiment, there is the inlet area from a relatively, wide V-shaped notch, to which the narrow clamping area adjoins, which also consists of a V-shaped notch of the same depth but with a much smaller one Opening angle best: eht. Details for the exact design of the inlet sections and clamping areas in the thread catching slot can be found in the cited prior literature will. Crucial for the bobbin case according to the invention is the Arrangement of the thread catching slot with several inlet areas and clamping areas in alternating sequence in a plane on the circumference of the bobbin case, the Plane is perpendicular to the axis of the bobbin case. To further clarify the Invention, the illustrations are intended to serve.

Figure 1 shows a bobbin case according to the invention, which already has a In the side view, the thread winding has a vertical section in FIG through the circumferential thread catching slot according to section II -. - II of Figure 1, while FIG. 3 shows, on an enlarged scale, a section according to III. - III in Figure 2 reproduces.

In Figure 1, the actual thread winding is already on the bobbin tube 1 2 has been applied in part. The bobbin 1 has in this embodiment only one thread catching slot near one end face of the sleeve. The thread catcher slot consists of wide inlet areas 3,3 'and narrow clamping areas 4,4', which alternate on the circumference of the bobbin.

Furthermore, the thread reserve 5 can be seen in FIG. 1; the loss wrap there is no drawing in the thread catching slot in order to make the catching slot visible.

The division of the inlet areas and clamping areas can be seen in FIG can be seen on the circumference of the thread catching slot. In the embodiment according to FIG. 2, the inlet areas 3, 3 'and the clamping areas 4, 4' have the same lengths on. Of course, it is also possible to change this division, for example the clamping area is shorter and the inlet area is longer to choose.

In Figure 3 is a possible embodiment of the transition from the inlet area 3.3 'in the clamping area 4.4' again given. Both areas are V-shaped notches of the same depth in the spool tube material. They make a difference however, due to the opening angle. While the inlet area 3,3 'is wide Has angle, so easily penetrate the wound thread into this notch can, the opening angle of the clamping area 4, 4 'is significantly smaller. Here should the thread is fixed by pinching it.

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Claims (3)

PATENT CLAIMS 1. Spool tube with thread catching slot, the at least is arranged at one end of the sleeve at a short distance from the end face, characterized in that the thread catching slot extends over the entire circumference of the Spool sleeve extends and several inlet areas and several in the thread catching slot Clamping areas are arranged one behind the other. 2. bobbin tube according to claim 1, characterized in that the thread catching slot has two inlet areas and two clamping areas. 3. bobbin tube according to claims 1 and 2, characterized in that For example, the transition from an inlet area to a clamping area in the same way is designed like the transition from a clamping area to an inlet area.