JPH0152496B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of weaving a kink-free fabric.

(Prior Art) It has been discovered that there are various causes of warp stripes occurring in the warp direction of textiles, and appropriate countermeasures have been taken. However, due to the relatively short history of water jet rooms, there are some aspects in which countermeasures cannot be said to be sufficient. In weaving using a water jet loom, it is unavoidable that the water splashed during weft insertion wets the reed feathers. A shift occurs.

FIG. 1 is a front view illustrating the phenomenon of misalignment of conventionally used reeds.

In FIG. 1, numeral 1 indicates the reed feathers, which are arranged at equal intervals when dry. However, due to weft beating, when water is driven together with the weft threads and wets the reed feathers, the water that remains between the reed feathers 2
Due to this, the spacing between the reed feathers is not equal.
A so-called phenomenon of blindness occurs.

Once the water 2 accumulates between the reed blades, the water 2 will not easily scatter even if it receives an impact from the reed beating, and the phenomenon of cross-reeding will continue for a long time.

This kind of misalignment of the reeds causes the warp stripes and warp lines mentioned above, especially in the case of textiles that use long fiber yarns with no twists or sag, that is, filament yarns or crimped yarns, in the warp yarns. Since there is no twist in the thread, there is no roundness in the thread, which is likely to cause such defects.

It has also been found that the higher the rotation speed of the water jet room, the more warp muscles occur due to misalignment of the reed.

For reed feathers, it is not possible to use special shapes or materials from the viewpoint of reed density, prevention of fuzz due to damage to the threads, and maintenance of sufficient strength to allow reed beating. However, no good solution has been found regarding the generation of transmuscular muscles.

(Objective of the Invention) The object of the present invention is to solve the conventional problems and to propose a method for weaving a kink-free fabric without warp lines in a water jet loom.

(Structure of the Invention) The present invention provides a method of weaving in a water jet loom using at least warp-free long fiber yarns, which includes the use of a curved reed as the reed of the water jet loom, Further, there is provided a method for weaving a no-twist and no-glue fabric, characterized in that the position of the front point hit by the reed is changed in the vertical direction.

The curved reed used in the method of the present invention is one in which the reed blades are curved as shown in FIG. FIG. 2 is a front view showing an example of a curved reed used in the method of the present invention. As shown in FIG. 2, the reed feathers 1 are made in a state in which the reed feathers are curved in a certain direction over a certain width (of course, it may be the same as the entire width of the reed width). Regarding the direction of bending,
As shown in Figure 2, the right side of the reed feathers is concave,
Conversely, the left side may be concave, or a combination thereof may be used.

Furthermore, the thickness, shape, material, etc. of the reed feathers can be the same as those of conventional reeds, and there is no particular restriction on the reed density.

The degree of curvature of the reed feathers is that the radius of curvature R is R = 100
The range from mm to 1000mm can be used effectively, R = 200mm
A preferred example is one with a diameter of 500 mm.

Next, in the method of the present invention, it is important to change the position of the weaving point in the vertical direction (that is, in the direction substantially perpendicular to the surface of the woven cloth) by some means.

The term ``orimae point'' here refers to the area where the weft threads are beaten with a reed to form a woven fabric, and does not mean a geometric point. Sometimes there are.

In the method of the present invention, it is necessary to change the weaving point in the vertical direction, but the magnitude of the change is 2 to 10
A thickness in the range of mm, more preferably 3 to 6 mm is used. If this amount of change is less than 2 mm, the curved reed is likely to be damaged by the threads;
If it exceeds 10 mm, it is not preferable as it may cause poor shedding, poor weft insertion, and poor weft cutting.

Further, in order to change the weave point in the vertical direction in this way, it may be changed irregularly, but it is sufficient to change it periodically.

When changing periodically, the period changes the fabric to
It is enough to make one round trip up and down while weaving 20 to 60 cm.

FIG. 3 is a side view showing an example of the vertical movement of the weaving point used in the method of the present invention, in which the warp threads 3, which are sheddingly moved by the healds 4, are connected to the reed 1, which swings about the point P as a fulcrum. The weft yarns (not shown) are beaten by the cloth 3' at the weaving point A to form a woven fabric 3'.

The weaving point A changes its position in the vertical direction by raising and lowering the fabric surface in the vicinity thereof. That is, a method is exemplified in which the cross bar 8 and temple bar 9 provided on the lever 10 which swings about Q as a fulcrum are moved in the vertical direction.

The swinging lever 10 is given a swinging motion by the rotation of the cam 6 via the cam ball 7. 5
is a guide roller that guides the woven fabric. Further, the movement of the weaving point A in the vertical direction is not limited to the above-mentioned mechanism.

Next, the warp used in the method of the present invention will be described. As the warp yarns, long fiber yarns with no twist and no twist are used. Here, the term "no twist" means substantially no twist, and the twist that occurs when the package is unwound (unwound twist) is used as the warp yarn. Threads with this are considered to be twist-free threads. or,
Non-glue yarn refers to a yarn that does not undergo a sizing process, and there is no problem in using spinning oil or post-processing oil that contains a component that is considered to be a sizing component. Further, examples of the long fiber yarn include raw filament yarn, filament treated with interlacing or mixed fibers, and crimped yarn treated with entangled fibers, but of course the above examples are used. It is not limited to. Further, the type of yarn is not particularly limited as long as it is made of continuous long fibers, but preferred examples include those made of synthetic fibers such as polyamide and polyester.

(Action of the Invention) Since the method of the present invention has the above-described configuration, it has an excellent action and effect in preventing the generation of warp lines when weaving in a water jet loom using non-twist and non-glue threads for the warp threads. It is something that plays. That is, in the method of the present invention, since a curved reed is used as the reed, the phenomenon of reed misalignment, which is a drawback of ordinary reeds, hardly occurs. This is because in curved reeds, the reed feathers are forced to bend in a certain direction.
As a result of the limited degree of freedom for bending the reed blades, even if water is present between the reed blades, the reed blades cannot move freely in any direction, and it is thought that no misalignment occurs.

As a result of not causing such misalignment, it is possible to prevent the meridian from forming due to it. On the other hand, if a curved reed is used, the degree of freedom in bending the reed blades is restricted, and as a result, the warp threads will only come into contact with the same part of the reed blades, damaging the reed blades at the contact points. Damage to the reed feathers causes fluff, and the fluff causes yarn breakage. Such damage to the reed feathers is significant when strong synthetic fibers such as polyester threads or nylon threads are used.

In the method of the present invention, such damage to the reed feathers is solved by changing the position of the weaving points in the vertical direction, thereby preventing the warp threads from coming into contact with only the same location on the reed feathers.

In this way, warp muscles due to the misalignment of the reed feathers are prevented,
High-quality textiles can be obtained. As described above, the method of the present invention can prevent warp streaks caused by the misalignment of the reed feathers, but it is also found to be effective in preventing warp streaks and warp streaks caused by other causes. Ta.

That is, originally, a reed is made using a material having a uniform thickness for the reed blades, and the intervals between the reed blades are the same. However, in reality, when manufacturing or using a reed, the spacing between the reed blades is
It produces identical but not constant reed feather spots. especially,
During use, if the reed feathers are twisted and the direction of the reed feathers changes with respect to the warp (the cross section of the reed feathers is often rectangular, oval, or a combination thereof), the spacing between the reed feathers will essentially change. Becomes non-uniform.

It is known that such uneven spacing of the reed feathers causes warp lines in textiles.

This phenomenon becomes more pronounced as the rotational speed of the water jet room increases.

In the method of the present invention, by using a curved reed and moving the weaving point in the vertical direction to move the point of action of the reed feathers, the warp can be forcibly meandered in the weft direction. Such forced meandering of the warp threads is highly effective in preventing defects in the warp threads caused by uneven spacing of the reed feathers. FIG. 4 is a plan view schematically showing the weave of a woven fabric, and FIG.
Since the warp yarns meander slightly in the weft direction, no warp lines are observed, but as shown in Figure 4 (b), with the conventional method, in areas where the reed blade spacing is wide, as shown at 3'' The warp spacing is large, and it becomes a warp.

(Example) Polyester filament yarn (50
An interlaced yarn (interlacing degree 42 ke/m) of denier/24 filaments) with no kink or glue was used, and a polyester filament yarn (75 denier/36 filaments) was used as the weft, with a warp density of 144 Book/3.8cm latitude density 115
A plain weave fabric was woven using a water jet loom (rotation speed: 600 rpm) at a density of 3.8 cm/3.8 cm. In the reed of this water jet room,
A reed whose reed feathers are curved with a radius of curvature of 360 mm (curved reed) is used, and during weaving, the weave point is moved up and down using the mechanism shown in Figure 3 (width of vertical movement =
3mm), woven. The obtained fabric is made of reed,
It had a high-quality woven surface with no warps due to uneven spacing of the reed feathers.

[Brief explanation of drawings]

FIG. 1 is a front view illustrating the phenomenon of misalignment of conventionally used reeds, FIG. 2 is a front view showing an example of a curved reed used in the method of the present invention, and FIG. FIG. 4 is a side view showing an example of the vertical movement of the weave point used in the method, and FIG. 4 is a plan view schematically showing the weave of the fabric, and FIG.
FIG. 4B shows a conventional method. 1...Kotoha, 1'...Koto, A...Orimae point.

Claims (1)

[Claims] 1. A method of weaving in a water jet loom using at least warp-free long fiber yarns with no twists and no glue, in which a curved reed is used as the reed of the water jet loom, and the weaving is performed by the reed. A method for weaving a kink-free and non-glue fabric characterized by changing the position of the weaving point in the vertical direction.