JPS6222904B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for preventing yarn sway during high-speed yarn winding. In recent years, direct spinning, drawing and winding technology for multi-filament yarns has been studied in order to increase productivity. The biggest problem in such multi-filament, high-speed yarn winding is the yarn sway of the running yarn. That is, in order to prevent the yarn from rolling on the rollers and to save energy, Godet rollers and drawing hot rollers both tend to be shorter in length, so the pitch between the yarns is narrower than in the past. Furthermore, when yarns are multi-filared, the pitch between the yarns becomes narrower (approximately 2 to 3 mm), so yarn sway due to accompanying air currents that occur when the roller rotates at high speeds causes unevenness between yarns running adjacent to each other. The filaments (single yarns) that make up the yarn tend to move, breakage of single yarns, and become fluffy, which reduces the quality of the wound raw yarn (which becomes the product) and causes defects. An object of the present invention is to provide a method that can prevent the yarn shaking that is inherent in multi-filament, high-speed yarn winding, and thereby improve the quality of the product raw yarn. In order to achieve this object, the present invention uses a godet roller consisting of a pair of nelson rollers and a drawing hot roller consisting of a pair of nelson rollers and a heat insulating cover surrounding the nelson rollers to form a multi-filament yarn at high speed. When the yarn is wound around the drawing hot roller, a yarn regulating guide is provided in the thread path between the rollers, and a windbreak plate is provided in a space surrounded by the drawing hot roller and the yarn path between the rollers. It is characterized by: Hereinafter, the present invention will be specifically explained with reference to the drawings. FIG. 1 is a front view of a conventional direct spinning and drawing device, FIG. 2 is a front view of a direct spinning and drawing device according to an embodiment of the present invention, FIG. 3 is a front view of a yarn path regulation guide, and FIG. The figure is a side view (partial) of the same guide, and FIGS. 5A to 5F are front views showing the installation positions of the windbreak plates, respectively. In FIG. 1, a multifilament multi-filament yarn Y (four yarns Y1 to Y4 in this example) spun from a spinneret 1, cooled and solidified through a cooling chimney 2, is oiled by an oiling roller 3, and is After being taken up by godet rollers 5, 5' (made of Nelson rollers) via a conversion guide 4, it is stretched and heat-treated by stretching hot rollers 6, 6' (made of Nelson rollers), and sent to a winder via an exit guide 8. (not shown) is wound up as a package. 7 is a heat insulation cover. However, in such a conventional device, the entrained airflow caused by the Godet rollers 5, 5' and the drawing hot rollers 6, 6', which rotate at high speed, is directly applied to the yarns Y1 to Y1.
When blowing against Y4, the accompanying airflow caused by the rollers and the accompanying airflow caused by the running of the yarn interacted with each other, causing turbulence, and the yarn was likely to sway.
In particular, areas with low yarn tension (of the yarn wound multiple times between a pair of drawing hot rollers 6, 6')
The yarn swayed violently in the final winding yarn, etc.). The present inventors conducted extensive studies based on this knowledge, and as a result, they arrived at the present invention. Figure 2 shows
A typical example is shown. In Fig. 2, 9A to 9C are yarn path regulation guides, 10A and 10B are windbreak plates, and 11A to 11
D is a curved plate. That is, the yarn path regulating guide 9 is provided in the stretching section between the godet roller 5 and the stretching roller 6.
Yarn path regulation guides 9B are provided at the upper and lower parts of the yarn to apply to the final winding (the closest to you) of the yarn wound multiple times between the pair of drawing hot rollers 6 and 6'. , 9C, and a windbreak plate 1 is provided above the drawing hot roller 6' (near the yarn entrance).
Windproof plates 10B are provided at the lower part of the drawing hot rollers 6 (near the yarn return opening), and curved plates 11A to 11D are provided at the four inner corners of the heat insulating cover 7 surrounding the drawing hot rollers 6 and 6', respectively. As the yarn path regulation guides 9A to 9C, it is preferable to use inverted movable slit guides as shown in FIGS. 3 and 4 (the present applicant has already filed an application as Utility Model Application No. 1983-20429). be able to. In other words, it is a slit guide in which a plurality of pin guides 13 are arranged in a row at intervals on a holder 12, and can be inverted about a support shaft 15 by the biasing force of a leaf spring 14. It is provided so that it can be reciprocated in a direction perpendicular to the running yarn by a drive unit (not shown) such as a rod mechanism. If such yarn path regulating guides 9A to 9C are used, it is possible to prevent the guide from collapsing during threading operation and hinder the operation, and it is also possible to prevent the guide from collapsing during threading operation, etc. By reciprocating the guide in the axial direction of
It is possible to prevent wear grooves from being generated on the surfaces of the rollers 6, 6' due to running of the yarn whose position is fixed. The windbreak plate 10 prevents the accompanying airflow caused by the rotation of the rollers 6, 6' or 5, 5' from blowing directly onto the yarn, and prevents turbulence caused by the interaction between the accompanying airflow caused by the rollers and the accompanying airflow caused by the yarn. In order to avoid this, it is necessary to install it in the position shown in FIGS. 5A to 5E. Windbreak plates 10A to 10F, 10J,
10I is effective in preventing the yarn from swinging due to the accompanying airflow caused by the rotation of the rollers 6, 6', and
The windbreak plates 10G, 10H, and 10K are effective in preventing the yarn from swinging at the yarn entrance and exit. In addition, it is not only possible to arrange each of A to F individually, but also to perform multiple arrangements (for example, A+D, C+F, etc.)
You can also combine them. It is preferable to use arcuate plates having substantially the same radius of curvature as the stretching hot rollers 6, 6' as the curved plates 11A to 11D, since this makes it difficult to cause turbulence in the airflow around the outer periphery of the rollers 6, 6'. As shown in the embodiment shown in FIG. 2 above, by using a combination of the yarn path regulation guides 9A to 9C, windbreak plates 10A and 10B, and curved plates 11A to 11D, which are the characteristics of the present invention, the most It can be seen that this method can be an effective means for preventing yarn sway even when the yarn sways violently. Examples and Comparative Examples Nylon 6 polymer was melt spun in a conventional manner. The spun yarn with 8 yarns and 10 filaments/yarn is cooled and lubricated in the usual manner, taken over a Godet roller consisting of a Nelson roller, and then transferred to a drawing hot roller consisting of a Nelson roller at a roller surface speed of 3600 m/min. After winding 5 times, 8 yarns were directly spun and drawn using the same roller system by winding each yarn individually. At this time, the following drawing hot roller equipment is used:
Each of the devices (a) to (f) was used. (a) A device provided with yarn regulation guides 9B, 9C and windbreak plates 10A, 10B in addition to the drawing hot rollers 6, 6' and the heat insulation cover 7. (b) In addition to the drawing hot rollers 6, 6' and the heat insulation cover 7, the yarn regulation guides 9B, 9C, and the windbreak plate 1
0A, 10B and curved plates 11A, 11B, 1
A device equipped with 1C and 11D. (c) A device (comparative example) in which only yarn regulation guides 9B and 9C are provided in addition to drawing hot rollers 6 and 6' and heat insulation cover 7. (d) An apparatus (comparative example) in which only windbreak plates 10A and 10B are provided in addition to the stretching hot rollers 6 and 6' and the heat insulation cover 7. (E) An apparatus (comparative example) provided with yarn regulation guides 9B, 9C and curved plates 11A, 11B, 11C, 11D in addition to the drawing hot rollers 6, 6' and the heat insulation cover 7. (F) In addition to the stretching hot rollers 6, 6' and the heat insulation cover 7, there are windbreak plates 10A, 10B and the curved plate 1.
A device provided with 1A, 11B, 11C, and 11D (comparative example). By examining the excess or deficiency of the number of single yarns in the obtained yarn, the frequency of occurrence of single yarn movement during the spinning process was investigated over a long period of time. The results are shown in Table 1 in terms of the number of occurrences per ton of product yarn.

[Table] As explained above, according to the present invention, it is possible to effectively prevent yarn shaking, thereby improving the quality of the wound raw yarn.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional direct spinning and drawing device, FIG. 2 is a front view of a direct spinning and drawing device according to an embodiment of the present invention, FIG. 3 is a front view of a yarn path regulation guide, and FIG. The figure is a side view (partial) of the same guide, and FIGS. 5A to 5F are front views showing the installation positions of the windbreak plates, respectively. 5, 5'... Godet roller, 6, 6'... Stretching hot roller, 7... Heat insulation cover, 9A to 9C...
Thread path regulation guide, 10A to 10K...Windbreak plate, 1
1A to 11D...Curved plate.

Claims (1)

[Claims] 1. When winding a multi-filament yarn at high speed using a godet roller consisting of a pair of nelson rollers and a drawing hot roller consisting of a pair of nelson rollers and a heat insulating cover surrounding the nelson roller, the drawn hot roller is wound. Yarn regulation guide is provided in the yarn path between the rollers of the yarn to be processed, and a windbreak plate is provided in a space surrounded by the drawing hot roller and the yarn path between the rollers. How to prevent shaking.