JP2005503491A - Method for producing woven fabric - Google Patents

Abstract

The invention relates to a method for weaving single-layered and/or multi-layered woven fabric, especially airbag fabric. The inventive method is characterised in that warp threads delivered by at least two warp beams (8, 10) are interwoven.

Description

【Technical field】
[0001]
The present invention relates to a method for weaving a fabric, particularly an airbag fabric.
[Background]
[0002]
In the conventional weaving technique of the woven fabric, after changing the woven fabric, the warp yarn may be loosened due to the variation in the installation during the replacement of the warp yarn. This loosening of the yarn is not preferable from the viewpoint of air permeability and appearance of the fabric. Furthermore, a technique for weaving a two-layer fabric from a warp band supplied from only a single warp beam is known. Here, distortion may occur between the upper fabric and the lower fabric due to the difference in the shed shape. This is not preferable because it causes a difference in physical properties between the lower fabric and the upper fabric. The difference between the lower woven fabric and the upper woven fabric is rarely fatal in manufacturing the woven fabric. This is particularly the case when manufacturing airbags, i.e. safety-related components. That is, in such an airbag, it is required to ensure reliability with respect to a physical response. This is particularly required when the fabric is used uncoated. Of the layers of the fabric, the uncoated portion where the physical properties are homogeneous is the most important. This is because the homogeneity of such portions substantially determines the air permeability that affects the function of the airbag.
[0003]
Besides the above, the prior art is further insufficient for the following reasons. For example, collecting warp bands from a single warp is consequently disadvantageous in warp production. This is because when producing warp yarns of a certain size, since many warp yarns are assigned to one warp yarn winding, there is no guarantee that each or all yarns have a sufficient size. The warp yarns are made to a certain size so that they are more durable in the weaving process. Therefore, if the size is incomplete, as a result, problems such as cutting of the capillary thread, generation of pills, cutting of the warp, etc. occur, and the quality is greatly impaired. The above problem can be prevented by ensuring an appropriate and uniform size. Since many warp yarns are assigned to one warp winding, several warp yarns may be bound over a long distance when forming a certain size. This also results in a decrease in the quality in the subsequent weaving.
[0004]
In the so-called back shed of a weaving machine, the number of sets is very large, especially when weaving two or more layers of fabric with a single warp. Therefore, even when the back hook opening is tight and the warp yarn size is theoretically optimal, there is a problem of quality degradation in weaving.
DISCLOSURE OF THE INVENTION
[0005]
The object of the present invention is to provide a method of weaving fabrics, in particular airbag fabrics, which has avoided or at least significantly reduced the disadvantages of the prior art.
[0006]
The above object is achieved by the method shown in claim 1. By distributing the warp band necessary for the entire woven fabric to at least two warp windings, it becomes possible to use a warp material that is more stable in size than the prior art. Thus, by carrying out the method of the present invention for conventional warp yarn production, each yarn can be sized with an interval of two warp yarns as a whole. This is due to a decrease in the number of sets per spool. The method of the present invention makes it possible to reduce the overall number of sets per spool as described above, thus minimizing the risk of warp yarns sticking together. As a result, both the binding of warp yarns and the generation of pills (cutting of capillary yarns with an inappropriate size) are substantially avoided, and the occurrence of defective products during weaving is extremely reduced.
[0007]
In addition to the above, the method of the present invention has further advantages. In particular, this is the case when multiple layers, for example two layers of fabric, are included, and each layer can be made separately by the ply warp band specific to each layer. This makes it possible to maintain a uniform tension over the entire width of the fabric. This is not inferior to commercially available generally manufactured single-layer fabrics. That is, by the method of the present invention, it is possible to achieve a desired ultra-high quality fabric by making the technical properties of each layer of the fabric substantially equal. In addition to the above, the difference in tension can be minimized by changing the single-layer P3 / 3 portion to the two-layer fabric by the technique shown in the present invention.
[0008]
One characteristic advantage of the method according to the invention is that the tension of each warp spool is controlled independently of one another and further increases the homogeneity of the fabric, in particular in a two-layer fabric.
[0009]
Another characteristic advantage of the method according to the invention is that it accepts warp yarns with different warp windings. For example, when a fabric for a side airbag of an automobile is targeted, a fabric layer facing a person riding the automobile (when mounted on an automobile) has a soft airbag against the human head. The surface can be selected. On the other hand, the other fabric layer facing the window can be made of a warp material that is particularly resistant to glass to be broken. The above-mentioned features of the present invention can be achieved by adopting warp yarns having different qualities and prices for the two layers. Therefore, it is possible to select a high quality or particularly suitable material (for example, a better material) for the “head side”, while using a rough and low cost material for the “window side”. This allows for more efficient manufacturing costs. Depending on the specific requirements, the warp strength, texture, stretchability, fineness, and material finish can be selected separately for two or more warp yarns. The assumed work is simply to use a stretchable warp for one spool and a non-stretch warp for the other. Advantages can be fully enjoyed by the above method.
【Example】
[0010]
The method of the present invention will now be described in detail by way of example with reference to the drawings.
[0011]
The warp windings 8 and 10 supply the warp band 9 to the weaving position. In the area of the harness packet 5 of the jacquard machine 7 (shown schematically), the back shed 6 and the weave shed by the reciprocating motion of each warp yarn ) 3 is formed. In the left hand end region of the shed 3, a lead 4 is shown, from which a single-layer and / or multilayer fabric 2 is taken up by a product take-up reel 1.
[0012]
By employing two or more warp windings in the present invention, considerable costs can be reduced even when weaving single and / or multilayer fabrics. This is because the time and frequency required for replacement of the warp are reduced by adopting a plurality of warp windings.
[Brief description of the drawings]
[0013]
FIG. 1 shows a schematic view of a weaving machine arrangement as viewed from the side.
[Explanation of symbols]
[0014]
DESCRIPTION OF SYMBOLS 1 Product take-up reel 2 Single layer and / or multilayer fabric 3 Weave hook 4 Lead 5 Harness packet 6 Back hook 7 Jacquard machine 8, 10 Warp winding 9 Warp band

Claims (5)

A method for weaving single layer and / or multilayer fabrics, in particular airbag fabrics,
A method comprising a step of weaving warps supplied from at least two warp windings (8, 10). 2. Method according to claim 1, characterized in that the tension of each warp spool (8, 10) is controlled independently of each other. 3. The method according to claim 1, wherein the warp windings (8, 10) receive different warp yarns. 4. A method according to claim 1, 2 or 3, wherein the method is applied to a loom adapted to a jacquard machine. 5. A method as claimed in claim 1, comprising at least two warp spools (8, 10).