JPH02169742A - Weaving of monofilament by water-jet loom - Google Patents

Abstract

PURPOSE:To stably weave a monofilament woven fabric using a water-jet loom by specifying the residual yarn length of weft in the flying direction of the weft. CONSTITUTION:A monofilament having a fineness of <=30 denier is used as a weft 1. The weft is cut with a cutter in such a manner as to protrude 2-7cm of the weft 1' from the tip end of a nozzle 2 toward the flying direction of the weft. The residual yarn length of the weft can be adjusted e.g. by adjusting the positions of the cutter and the nozzle or adjusting the length of a nozzle cap.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a monofilament weaving method using a water jet loom. More specifically, the present invention relates to a water jet loom weaving method that can stably obtain a good fabric when a monofilament system of 30 deniers or less is used for the weft.

(Prior Art) Conventionally, woven fabrics using monofilament yarns of 30 denier or less as wefts (hereinafter referred to as monofilament woven fabrics) are
Due to the difficulty of inserting weft threads, high-productivity jet loom production is not carried out, and production is carried out using sander looms, rapier looms, gripper-one-claw machines, etc. at low rotation speeds of 20 Orpm or less. Sandle looms have the problem of high weaving costs due to low productivity, and the quality of the fabric deteriorates significantly due to defects in the weaving steps when replacing the shuttlecock, while rapier looms have a high density fabric of more than 250 threads/inch. However, gripper looms that can produce even high-density products have problems such as high loom costs (and, moreover, the number of machines currently in stock is limited).

Therefore, in order to reduce the cost of weaving monofilament fabrics and to solve the individual problems with conventional looms, there is a need to develop jet looms with higher productivity.

(Problems to be Solved by the Invention) The object of the present invention is to solve the problems that conventionally used shirttle looms, rapier looms,
The present invention aims to provide a method for weaving a monofilament fabric using a water jet loom, which could only be woven using a gripper loom, and also achieves a reduction in the weaving cost of the monofilament fabric.
It is an object of the present invention to provide a weaving method that stably obtains a good quality fabric.

(Means for Solving the Problems) The present invention provides that when weaving monofilament yarns of 30 denier or less as wefts using a water jet loom, the wefts do not fly after the wefts are cut during beating. From the weft insertion nozzle on the loom until the start,
The length of the weft yarn remaining in the weft flying direction exposed from the tip of the weft insertion nozzle to the weft flying direction is 2 to 7 C.
This is a monofilament weaving method using a water jet loom characterized by a T11.

The present invention was completed based on the discovery of the above-mentioned optimal weft insertion conditions when weaving monofilament yarns of 30 denier or less in a water jet loom.

Normally, when LI insertion is performed in a water jet loom, the weft yarn that has completed the previous weft insertion is cut by the cutter 5 shown in FIG. 2 as it is beaten. The weft yarn cut by the cutter is bent at the tip of the nozzle. Therefore, in order to straighten the bent ends of the weft threads that will fly between the warp thread openings in the next weft insertion, towards the warp thread openings, a high A jet of injection pressure is applied. This jet stream is called advance jet water. Then, before the start of the weft flight, the weft tip, which has been stretched straight toward the warp shedding by the preceding water injection, opens the weft gripping portion and starts the weft flight.

As shown in Figures 2 and 4, the residual weft yarn in the present invention refers to the residual yarn that is exposed from the nozzle tip toward the weft flight direction for the next weft insertion when the weft yarn is cut with a cutter, as shown in Figures 2 and 4. This corresponds to the weft yarn portion 1'.

Further, the remaining weft yarn length is the length of the aforementioned remaining weft yarn 1'.

If the remaining weft length is shorter than 2 cm, the weft may come out of the nozzle due to the reaction after being cut by the cutter, or the remaining weft length may not be the same even if a high jet of water is applied. Due to the short length, the weft conveying force is insufficient, and a phenomenon of insufficient weft delivery occurs in which the weft cannot reach the nozzle side sufficiently at a certain timing, resulting in frequent loom stoppages, making it difficult to obtain stable weaving performance.

On the other hand, if the remaining weft yarn length is longer than 7 cm, the remaining weft yarn cut by the cutter is too long and will adhere to parts of the loom such as the nozzle and reed due to water, and the remaining weft yarn will also be removed by the preceding water injection. It cannot be fully stretched straight toward the weft opening, and the tip ends up flying with a bent position. As a result, the threads get caught in the warp threads, causing the ends to break, resulting in frequent loom stoppages, and stable weaving performance cannot be achieved.

Therefore, in order to stably obtain a good woven fabric, it is necessary to carry out weft insertion under conditions in which the remaining weft yarn length is in the range of 2 cm or more and 7 cm or less. More preferably 3 cm or more, 4.5 cm
m or more.

Note that the means for achieving the weaving method according to the present invention include shifting the position of the cutter on the nozzle side in the width direction of the fabric, shifting the position of the nozzle in the width direction of the fabric, and fixing the nozzle to the nozzle joint. This can be done by varying the length of the nozzle cap 4 shown in FIG.

The monofilament referred to in the present invention includes synthetic fibers such as polyester and polyamide. Its fineness is 7
A denier (d) of up to 30 denier (d) is preferable; if it is 30 d or more, the monofilament becomes coarse and hard, resulting in poor weft flyability (and stable loom operability cannot be obtained).

Furthermore, if the monofilament is less than 7 d, the strength of the monofilament is weak, and tearing of the edges occurs during weaving, making it difficult to weave.

(Example) Hereinafter, an example of the weaving method according to the present invention will be described. However, the present invention is not limited to this example.

Example Using polyester monofilament 30 denier for the warp and polyester monofilament 30 denier for the weft, taffeta with a warp density of 196 threads/2.54 cm and a weft thread density of <196 threads/2.54 cm was fabricated on a loom at a rotational speed of 40 rpm. Weaving was carried out using a water jet loom under the following weft insertion conditions.

Injection start crank angle 105° Weft flight start crank angle 115° Weft entry flight end crank angle 240° Under the above conditions, weft remaining yarn length exposed from the weft insertion nozzle tip in the weft flight direction (1!,) by changing the length of the nozzle cap to 2cm+,
2.5cm, 3cm, 5cm, 7cm, 8cm,
Weaving was performed by changing the length to 9 cm, and the number of times the loom was stopped (times/machine/day) corresponding to each was investigated. The obtained results are the first
As shown in the figure.

As is clear from Figure 1, the remaining weft yarn length (f) is 3 to 7.
In the range of cm, the number of times the loom was stopped could be significantly reduced compared to the case outside the above specified condition range.

(Effects of the Invention) The weaving method according to the present invention is configured as described above, and under specific weft insertion conditions, even when weaving is carried out in a water jet loom using a monofilament of 30 denier or less for the weft, the weaving method is stable. Weaving can be achieved, and a reduction in the cost of weaving monofilament fabrics can be achieved.

[Brief explanation of the drawing]

FIG. 1 shows the number of times the loom is stopped when weaving is carried out with varying lengths of remaining weft threads. FIG. 2 is a perspective view of the nozzle section. Figure 3 (A) is a partial view of the nozzle and nozzle cap;
Figure (B) is an enlarged view of the nozzle fixed to the nozzle joint with a nozzle cap. FIG. 4 is an enlarged model diagram of the nozzle section viewed from above, and FIG. B
) shows the relationship between the nozzle cap and the remaining weft yarn length when a long nozzle cap is attached. 1-Weft, 1'-Remaining weft thread, 2--Nozzle, 3--Nozzle joint, 4--Nozzle cap, 5--Cutter, 6--Reed, 7--Gripper--Figure 1 Patent Applicant: Asahi Kasei Industries, Ltd. MkThN&& (mm)

Claims (1)

[Claims] When weaving using a water jet loom using a monofilament of 30 denier or less as the weft, weft yarn flying is carried out from the weft inserting nozzle on the loom during the period after the weft is cut during beating and until the weft starts flying. A monofilament weaving method using a water jet loom, characterized in that the length of the weft remaining in the running direction is 2 to 7 cm, which is exposed from the tip of the weft insertion nozzle in the weft running direction.