JPS6050895B2 - Textile manufacturing method - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a method for producing a fabric using an air jet loom (hereinafter abbreviated as an Al loom), and more specifically, a method for continuously feeding the weft yarns at the tail end. The present invention relates to a method for producing high-quality textiles in which the loom is stopped before the tail end seam is fed, and during this period the weft seam by the tail end is eliminated, and the seam is not woven.

(Prior art) When weaving textiles, weft yarns are supplied by using tail-end yarns when synthetic fiber yarns are used, and by setting two to four bobbins on the bobbin stand of the loom to make the weft yarn supply continuous. Measures to save labor in replenishment are generally adopted.

In this method, the knots between the bobbins are woven, so it is good if the knots do not pose any problem in terms of the quality of the fabric, but if the knots pose a problem, improvements need to be made. For example, glass cloth used for printed circuits is often used in precision equipment such as computers, and there are very strict quality requirements regarding reliability.
The number of defective parts must be 27n or less among the 1007Tl inspected for every TrL. The two most common defects are dirt and bulky defects, and prevention of bulky defects in particular is strongly required as they can damage the copper foil and cause circuit breaks when press-molding printed circuit boards. has been done. When weaving glass cloth on a shuttle-type automatic loom, the unifil (automatic tube winding machine) attached to the loom winds the tube and automatically supplies the weft, but the weft is fed to the bobbin manually. However, a method using tail end yarn was not adopted.

This is because glass yarn cannot be tied because its knot strength is extremely low, and glass yarns are usually joined by adhesive. However, in this case, since two glass yarns overlap at the seam, if this part were woven, the overlapping part would appear as a bulky defect. Moreover, the weight of glass yarn is usually less than 4 kg/bobbin, and the weight of glass yarn is 1 rrt. The width of the fabric is approximately 30rrL. Because it is woven, when using tail end thread, it is 1007TL,
Three glass yarn seams are woven in each. In other words, it has three bulky defects per 100 m, and the seams alone disqualify it as a glass cloth for printed circuit boards. For this reason, even though the AJ Loom is a high-speed innovative loom, the supply of weft yarns requires manual labor, such as changing the bobbin manually, setting it again from the beginning, and restarting. The reality is that the machines are stopped and operated in a way that hinders the high productivity of the AJ room. In this respect, when weaving clothing fabrics using synthetic fibers, emphasis is placed on the appearance of the weave and the product, and small yarn joints (knots) are almost invisible and are not a problem at all. High productivity is achieved through high-speed operation and efficient weft replenishment, resulting in sufficient labor savings.

On the other hand, Garasya! In the case of synthetic fibers, the yarn length is short and the amount of weft used is 7 to 1 per bobbin, which is more than in the case of synthetic fibers.Moreover, the AJ loom has a high productivity that is more than twice as high as that of shuttle automatic looms. It requires a lot of manpower. Therefore, in the production of glass cloth for printed boards in which weft joints cannot be woven, there is a particular problem in that the machine stops every time the weft is switched and resupplied, resulting in a reduction in operating efficiency. (Purpose of the invention) This invention was made in view of the above circumstances, and its purpose is to
To propose a method for producing a woven fabric that can eliminate weft joints without weaving in a J room when one tail end weft is used, automate weft switching, and improve weaving efficiency.

(Structure of the Invention) The method for manufacturing a woven fabric according to the present invention is such that when producing a woven fabric by continuously supplying the end yarns of the tail end yarns in an AJ room, the weft yarn bobbin is placed on standby from the weft bobbin during yarn feeding. It detects the movement of the thread between the bobbins when the weft is switched to the inner bobbin, stops the AJ loom, opens the clamper in the stopped state, opens the heddle, and positions the air guide between the open warp threads. This method is characterized in that after air is injected from the nozzle to blow away the weft seam to the opposite side of the fabric from the nozzle, the operation of the AJ room is restarted.

(Example) Examples will be described below with reference to the drawings.

In Figure 1, weft bobbin 1 with tail end yarn wound
, 2 are set on bobbin stands 3 and 4, the end thread of bobbin 1 and the head end thread of bobbin 2 are connected at a seam 13, bobbin 1 is being fed, and bobbin 2 is on standby. . After the yarn pulled out from the bobbin 1 passes through yarn guides 5 and 6,
The length measuring roller 7 measures the length to a predetermined length and stores it in the storage drum 8. Thereafter, the yarn passes through a yarn guide 10, then a clamper 11, and is blown off by air injection from a main nozzle 12. The role of the clamper 11 is to close when storing the measured yarn in the storage drum 8, and to control the movement of the yarn by opening when blowing the yarn from the main nozzle 12. Note that a pool vibrator may be used instead of the storage drum 8. The movement of the yarn when the weft is switched from the bobbin 1 that is being fed to the bobbin 2 that is waiting is detected by the detector 14 by the movement of the yarn between the seam 13 and the bobbins connected thereto, and the signal is attached to this. The signal is sent to the control circuit 16 via the seam detection circuit 15 to stop the AJ room and control its movement.

FIG. 6 shows a mechanical version of the detector 14.

The spring-equipped washers 24 and 25 that lightly grip the yarn connected to the weft seam 13 are set, and the detection lever 27 connected to the limit switch 26 is set. When the thread is switched from bobbin 1 to bobbin 2, the thread between bobbins 1 and 2 connected to the seam 13 moves, and when the thread comes off the spring-equipped washers 24 and 25, the detection lever 27 is moved by a spring or spring, and the limit switch is activated. 26 is activated. After detecting the movement of the thread between the bobbins and stopping the AJ loom, the AJ loom's inching circuit is then used to move the heddles 18, 1'' to the upper and lower positions and the warp threads 19, 19'' to the upper and lower positions. is opened, and at the same time the air guide 17 is positioned between the opened warp threads 19, 19''.

Alternatively, when the AJ room is stopped, the relative positions of the various parts of the AJ room can be set in advance so that they are as described above. Further, the clamper 11 shown in FIG. 1 is opened, and the pressure roller 9 and length measuring roller 7 of the length measuring device shown in FIG. 2 are opened. Conventionally, pushing the pressure roller 9 upward was done using a manual lever, but in this manufacturing method, for example, an air cylinder is attached and a solenoid valve is opened and closed according to instructions from the control circuit 16, using pressure to move the air cylinder. is operated to open and close the pressure roller 9. In this state, air is injected only from the main nozzle 12, only the sub nozzle 20, or the main nozzle 12 and the sub nozzle 20 at the same time as shown in FIG. 5, or in the case of an AJ room without a sub nozzle as shown in FIG. Sprayed weft seam 13
is ejected to the opposite nozzle side of the fabric. In the drawings, reference numerals 28 and 29 indicate cutting devices that cut the weft yarns and align the edges during weaving. Alternatively, as shown in FIG. 3 or 4, open the warp threads 19, 19'', open the air guide 17 or suction vibrator 21, and position the air guide 17 or suction vibrator 21 between the open warp yarns 19, 19''. Then, with the clamper 11 open, air is injected from the nozzle, and at the same time, the measuring device is driven to measure the weft seam 13.
is discharged to the opposite nozzle side of the fabric. The yarn including the seam thus removed on the side opposite to the nozzle of the fabric is suctioned by a suction blower 22 shown in FIG. 5, and is forcibly removed through a suction vibrator 21 opened near the outlet of the air guide.

If you do this, the thread may get caught in the middle, causing an exclusion error. There is no risk of survival. In this fabric manufacturing method, the removal of the seam 13 between the bobbins 1 and 2 is started by injecting air from a nozzle and opening the pressure roll 9, or by operating a length measuring device. - It is best to confirm in advance that there is enough time to eliminate the seam 13, and then set the timer.

This timer is a control circuit 16 that controls the starting of the loom, etc.
built into and operated. Or, as shown in Figure 5,
Attach the seam detector 23 to the suction blower 21 and check the seam 13.
It is also possible to know when the threads connected to the line have been removed. When the removal of the seam is completed in this manner, the operation of the AJ room is restarted according to instructions from the control circuit 16. (Function) The present invention has the above-described configuration, and stops the AJ loom by detecting the joint part of the weft at the tail end, properly sets the relative position of each part, and eliminates the joint part by jetting air from the nozzle. This consists of the process of restarting the AJ room.

Therefore, the machine stops just before the seam is woven, and the seam can be reliably removed in the next process. Furthermore, since seam portions can be removed by applying the functions provided by the AJ room, this textile manufacturing method that incorporates the seam removal process can be easily automated. (Modification) In the above embodiment, a mechanical detector using a limit switch was used to detect the movement of the yarn when the weft was switched, but in addition, a photoelectric detector using a light emitting diode (
For example, a photoelectric detection device using a PD-101 model manufactured by Sigma Giken Co., Ltd. or a phototube may be used as the detector.

(Effects of the invention) As described above, this fabric manufacturing method produces high-quality fabric using tail end yarns in the AJ loom without weaving seams.
To enable weaving to be performed automatically without impairing the original high performance of the AJ room.

Therefore, it is possible to reduce the cost of high-quality glass cloth for printed circuit boards.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic diagram of the weft supply part of the AJ room, FIG. 2 is a side view of the weft length measuring and storage device, and FIGS. 3 and 4 are diagrams. A side view showing the positional relationship of the main parts of the AJ room when removing weft seams, and a side view of another type of AJ room, Figure 5 is a plan view of Figure 3, and Figure 6 is a side view of the seam detection device. It is a diagram. 1... Weft bobbin being fed, 2... Weft bobbin waiting, 3, 4... Bobbin stand, 5, 6, 10... Yarn guide, 7...
・Length measuring roller, 8...Storage drum, 9...
・Pressure roller, 11... Clamper, 12... Main nozzle, 13... Seam, 14... Detector, 15... Detection circuit, 1
6... Control circuit, 17... Air guide, 18, 1''... Heald, 19, 19''... Warp, 20... Sub nozzle, 21... ...Suction vibe, 22...Suction blower, 23...
Seam detector, 24, 25... Spring washer, 26... Limit switch, 27...
Detection lever, 28, 29...cutting device.

Claims (1)

[Claims] 1. When producing a woven fabric by continuously supplying weft yarns by splicing end yarns of tail end yarns in an air jet loom,
The movement of the yarn between the bobbins is detected when the weft is switched from the weft bobbin being fed to the waiting bobbin, the air jet loom is stopped, and while the air jet loom is stopped, the clamper is opened, the heald is opened, and the air guide A method for producing a textile fabric characterized by placing the weft yarn between the open warp yarns, jetting air from a nozzle to blow away the joint part of the weft yarns to the side opposite to the nozzle side of the textile fabric, and then restarting the operation of the air jet loom. 2. A method for manufacturing a woven fabric according to claim 1, characterized in that a limit switch is used to detect movement of yarn between bobbins when the weft is switched from a weft bobbin that is being fed to a bobbin that is waiting. . 3. Claim 1, characterized in that the movement of the yarn between the bobbins when the weft yarn is switched from the weft bobbin being fed to the waiting bobbin is detected using a photoelectric detection device using a light emitting diode. Method for producing the fabric described in Section 1. 4. Claim 1, characterized in that the movement of the yarn between the bobbins when the weft yarn is switched from the weft bobbin that is being fed to the bobbin that is waiting is detected using a photoelectric detection device that uses a phototube. Method of manufacturing the described textiles.