JPS61239038A - Method and apparatus for operating drawer bar - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to semi-drawn thermoplastic synthetic fiber yarn (hereinafter referred to as P OY).
(abbreviated as UDY) or undrawn yarn (abbreviated as UDY hereinafter).

(Prior art) When conventional thermoplastic synthetic fibers are used for woven fabrics and 'f4 knitting, the polymer is melt-spun, stretched, and then pierced or wound into a tube prior to the weaving process. As a preparatory process, it is common to arrange and oil or size a large number of sheets and wind them into a beam, and if necessary, go through a process such as overlapping several beams and then supply them to the weaving and weaving process. .

However, the process for obtaining drawn yarn made of thermoplastic synthetic fibers involves melt-spinning each undrawn yarn, which is then subjected to four drawing forces through independent yarn paths, so that each individual drawn yarn is packaged. It is inevitable that there will be considerable variation in the uniformity of physical properties such as strength and elongation, dyeability, etc., and the energy required for processing is also large, causing high costs. Recently, by increasing the spinning speed in the spinning process, the conventional UDY has been replaced with fully oriented yarn (FOY).

Research is underway to try to obtain this material and use it immediately in the weaving process by omitting the stretching process, but this has not yet been completely successful. In such a situation, the above-mentioned complicated and expensive stretching process can be omitted and an inexpensive UDY
. Draw warping technology, which attempts to obtain high-quality weaving and knitting beams by simultaneously performing drawing and warping using POY, has been developed and is gradually being applied. In such draw warping technology, as a result of drawing the fiber sheet parallel to the width direction at a high density, the variation in physical properties between each drawn thread is less than that between a considerable number of threads obtained by a normal drawing machine. This is much smaller than the variation in physical property values. However, among the many threads during draw toping,
A small number of UDY or POY may run out,
Or POY, the phenomenon of a few of the multifilaments breaking or sagging, so-called fluffy threads, is extremely rare, so it cannot be expected that there will be no females.
In this case, the machine is usually stopped once, the defective part of the thread is removed, and the machine is restarted after taking measures such as adding a previously prepared auxiliary thread to the part. When the stretching is temporarily stopped in this way, consideration is taken in the mechanical design to keep the hot plate for stretching away from the fiber sheet in order to prevent stretching unevenness, but even so, no unevenness due to stretching or heat history is observed. It is difficult to obtain a fibrous sheet without such a material, and the beam obtained by processing such a fibrous sheet becomes a defective product.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a draw warping method and apparatus for obtaining weaving and knitting beams free of uneven areas of stretching and/or thermal history.

(Means for Solving the Problems) The method of operating the draw warper according to the present invention is to draw a large number of semi-drawn yarns or undrawn yarns of thermoplastic synthetic fibers in parallel, stretch and warp them, and then wind them up. The present invention is characterized in that the machine is operated without stopping until a predetermined length is hoisted by detecting the position where breakage or fuzz occurs and further recording the position where the breakage or fluff occurs, and furthermore, the drawer machine according to the hydraulic head invention. The device is a device for stretching, warping, and winding semi-drawn yarn or undrawn yarn of thermoplastic synthetic fibers, and a device for detecting the occurrence position of yarn breakage or fuzz, which consists of an optical sensor, is installed between the drawing zone and the winding machine. and further includes means for recording the detection results.

The yarn drawn and warped by the drawer par operating method and apparatus according to the present invention may be any thermoplastic, moldable synthetic fiber such as polyamide, polyester, polypropylene, etc. These UDY.

The required number of yarns are placed on a creel for warping, and the yarns pulled out from the yarn guide provided corresponding to each package are changed direction, aligned in parallel, and proceed to the drawing area where they are drawn. The film is stretched at a stretching ratio set between the rollers. The shape, number, and shape of these roller groups can be adjusted to meet the requirements for accurately stretching fiber sheets.
The presence or absence of heating and the installation method may be any method, and a hot plate, liquid bath, etc. may be provided between the roller groups. On the other hand, in the process of continuous stretching and warping, it is necessary to warp one beam without stopping midway, as mentioned above, in order to obtain a fiber sheet with uniform physical properties. The presence of cut yarn ends and fluffy yarns resulting from such continuous operation must be dealt with in the next weaving and knitting process. The weaving and knitting process can be operated rationally and efficiently if it is known in advance at what number in the array order the yarn is in each beam and at what distance from the end of the beam that yarn breakage or fluff occurs. can. In other words, a machine that weaves and knits with a complete beam that has been obtained in advance without stopping, and a machine that weaves and knits with a beam that has built-in fluff yarn are operated separately.
When weaving or knitting a part with yarn breakage or fluffy yarn, the location is predicted in advance by recording, and the defective part is removed and compensated for during the weaving and knitting process. The advantage of this method for removing defective yarns in the weaving and knitting process is that the linear speed of the weaving and knitting process is less than one tens of thousands of times lower than the drawing and warping speed, and that the physical properties of the woven and knitted material caused by stopping It can be easily understood that the difference is so small as to be almost negligible.

First, the overall configuration of the drawer par device according to the present invention is explained.
This will be explained with a diagram.

(1) is a creel in which a yarn package (2) is installed, and after the yarn (3) is changed direction by a yarn guide (4), it is aligned in parallel through a yarn cutter (5) and a drawing zone (6 ). After that, the first detection device (7) and the second detection device! ! (8) detects and records abnormalities, and if thread breakage is detected, the detection device! The yarn cutter (5) installed upstream of (7) and (8) is operated to cut the corresponding yarn package (2).
Stop supplying yarn from. If fluff is detected, record its occurrence. The threads that have passed through the detection devices (7) and (8) are entangled by an entangle jet (9) and wound onto a beam 01) by a winder αQ.

Hereinafter, an example of a device for detecting the occurrence position of yarn breakage or fuzz will be described with reference to the drawings.

FIG. 2 is a top view of the fiber sheet in the vicinity of the first detection device (7), and the yarn runs horizontally, and in the second drawing, runs from the left side to the right side. FIG. 3 is a longitudinal sectional view taken along a plane perpendicular to the traveling direction of the fiber sheet, and in this figure, the threads run perpendicular to the plane of the paper. Each thread constituting the fiber sheet is divided into a plurality of groups (first group) according to the position in the lateral direction, and the transmitting parts M1 to An and the light receiving parts B1 to Bn of the optical sensor are arranged corresponding to the groups. The yarn breakage and the presence or absence of fluffy yarns are detected in units of the first group based on changes in the light intensity of the light receiving section. #I fiber receipt After each thread constituting the receipt passes through the first detection device @ (7), the first
For each group, each group within the group is spread out in order (zeta) so that the inclination in the longitudinal direction becomes large and parallel to the yarn bundle traveling direction and enters the second detection device (8). Figure 4 shows the second detection device! (8)
FIG. 5 is a side view of the yarn bundle in the vicinity, and FIG. 5 is a longitudinal cross-sectional view taken along a plane perpendicular to the traveling direction of the yarn bundle, in which the yarn runs perpendicular to the paper surface. The threads constituting the three-dimensionally spread thread bundle are divided into a plurality of groups (second groups) according to their positions in the vertical direction, and the transmitting parts C1 to B of the optical sensors corresponding to the groups are shown.The dotted lines indicate the shadows caused by the threads. ) to detect yarn breakage and the presence or absence of fluffy yarn in units of the second group. In addition, when setting the first group and the second group, the vertical slope is set so that the threads forming the same group in the first group are included in different groups in the second group, and the fiber sheet is When the number of threads constituting is N, the number of threads in the first group and the number of threads in the second group are at least f1, and the sensing results of the first detection device and the second detection device are compared in a matrix. It is possible to record the yarn position in the fiber sheet 1 at which the abnormality has occurred.

For records, the yarn loft, symbols representing spinning conditions,
In addition to the manufacturing machine number, manufacturing date, shipping number, symbol representing stretching and warping conditions, processing date, beam number, etc., the corresponding All you need to do is record the arrangement order of threads that have been cut or fuzzed on the beam, the size of the fuzz, and the distance from the start of winding.The minimum required is the beam number, the arrangement order of threads, and yarn defects from the start of winding. Since it is sufficient to record the distance to the point of occurrence, a computer with a very small storage capacity is sufficient.

When weaving and knitting with the beam of the present invention, it is necessary to remove broken yarns or yarns with fuzz during warping on the weaving and knitting machine and replace them with yarns that have regular physical properties. The prosthetic yarn used in this process must be manufactured from the same loft and under the same processing conditions as the raw yarn used for drawing and warping. It is best to prepare the prosthetic thread by winding it up with a wine goo with a small number of weights. A tension-adjustable variable speed wine goo or the like is suitable as the wine goo to be used here.

(Effect of the invention) The present invention has the following effects.

1) As a result of making it possible to carry out drawing and warping of one beam continuously without interruption, various problems such as fineness unevenness, strong elongation unevenness, and staining unevenness of yarn bundles that occur when the machine stops are eliminated. It is possible to prevent the occurrence of defective yarns and obtain a uniform and high-quality weaving edge beam.

2) The arrangement order of broken or fuzzed threads in the beam and the position where they occur can be recorded with a simple mechanism, so when weaving or knitting, prepare the prosthetic thread in advance according to the position and place it on the machine stand. It becomes possible to carry out prosthesis in a planned manner, and it is possible to easily obtain a woven or knitted fabric with inconspicuous defects even from beams with defects.

Example 1 350 polyethylene terephthalate filament yarns
The yarn was spun at 0.7 ff/min to obtain a highly oriented undrawn yarn of 70 denier and 24 filaments. The highly oriented undrawn yarn was warped using the apparatus shown in FIG. 1, with a number of warping of 592, a stretching ratio of 164, a heating roller temperature of 72°C, a heating plate temperature of 115°C, and a stretching/warping speed of 60.
At 0 m/min, a 21-inch wide beam was drawn and warped using a yarn breakage and fluff detection and recording device having the configuration shown in Figs. Got the beam. The drawn yarn obtained was 50 denier/24 filaments.

On the other hand, as a comparative example, a highly oriented undrawn yarn of the same denier obtained under the same spinning conditions was drawn and warped using a method that stops and repairs yarn breakage/fluffy yarn when it is detected. A beam with warp length was obtained. Using these beams, a knitted fabric with a back satin structure was knitted using a Kl type tricot knitting machine manufactured by Karl Mayer. The results of stretching and warping and knitting in this way and the ratings of the obtained fabrics are shown in Table 1, Black 1 to Black 4.

It can be seen that according to the method of the present invention, the operating efficiency of the drawing and warping machine is improved compared to the conventional method, and the quality of the obtained fabric is also excellent.

Example 2 Using polyethylene terephthalate drawn yarns of 24 filaments and 75 denier/36 filaments, warping was performed by a method in which the yarn was stopped and repaired when yarn breakage/fluff yarn was detected, and seven beams each were prepared. Using these beams, a knitted fabric with a satin structure was knitted using a Kl type tricot knitting machine manufactured by Karl Mayer. The results of knitting in this way and the grades of the fabrics obtained are shown in Table 1, black 5 and 50. It can be seen that the quality of the fabric obtained by the method of the present invention is superior to that obtained by warping and knitting by the conventional warping method using drawn yarn.

(hereinafter referred to as e)

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the entire drawer bar device according to the present invention, FIG. 2 is a top view of the first detection device, and FIG.
4 is a side view of the second detection device, and FIG. 5 is a longitudinal sectional view taken along a plane perpendicular to the yarn bundle traveling direction in FIG. 4. (1)... Creel, (2)... Yarn package, (
3)...Thread, (4)...Thread path guide, (5)...
Yarn cutter, (6)...Stretching zone, (7)...
・First detection device, (8)...Second detection device, (9
)... Entangle jet, (10... Winding, M, Ql)... Beam, A1~8ne C1"" Cn... Optical sensor transmitter, B1~Bn, D1~Dn... - Optical sensor receiving section. 〃 Kanebo Gosen Co., Ltd. Figure 1 Figure 2

Claims (3)

[Claims] (1) A large number of semi-drawn or undrawn yarns of thermoplastic synthetic fibers are aligned in parallel, stretched and warped, and when winding up, the position of yarn breakage or fluff is detected, and the position of occurrence is recorded. A drawer par operating method characterized in that the machine is operated without stopping until a predetermined length is rolled up. (2) In a device for stretching, warping, and winding semi-drawn yarn or undrawn yarn of thermoplastic synthetic fibers, a device for detecting the occurrence position of yarn breakage or fluff, which consists of an optical sensor between the stretching zone and the winding machine. A drawer par device, further comprising means for recording the detection results. (3) The drawer paring device according to claim 2, further comprising a yarn cutter operated by a yarn breakage detection signal between the yarn package and the detection device.