CN117026485A - Automobile safety airbag hinge screen cloth with weft knitting structure - Google Patents

Abstract

The invention belongs to the technical field of airbag hinge mesh fabrics, and provides an automobile airbag hinge mesh fabric with a weft knitting structure, which comprises a mesh fabric, wherein the mesh fabric comprises a first group of yarns and a second group of yarns, and the first group of yarns and the second group of yarns are woven into a mesh fabric through yarn knitting plain needle liners; the mesh cloth can bear high temperature, pressure and fluid movement during injection molding, has stable structure, and when the safety airbag is exploded, the loops woven by the first group of yarns are broken and scattered simultaneously, so that the straightening time of the second group of yarns is greatly reduced, the second group of yarns can be straightened simultaneously and bear strong force, and the mesh cloth can be woven on a 5-12-needle computerized flat knitting machine, so that the mesh cloth has wide applicability of raw materials, high production efficiency and large meshes and is convenient for injection molding.

Description

Automobile safety airbag hinge screen cloth with weft knitting structure

Technical Field

The invention belongs to the technical field of airbag hinge mesh fabrics, and particularly relates to an automobile safety airbag hinge mesh fabric with a weft knitting structure.

Background

The automobile safety airbag is generally arranged below an automobile instrument panel, the corresponding area of the instrument panel is locally weakened, when an automobile collides violently, the safety airbag is inflated and expanded within 10ms and breaks through the instrument panel, an energy absorption area is formed between the automobile body and a passenger, the instrument panel is likely to crack in the process, and the fragments pop up at a high speed to cause injury to the passenger. To prevent this, the panel area of the car airbag needs to be opened to a certain extent with a cushion so that the airbag can be smoothly ejected;

at present, automobile safety airbag manufacturers generally adopt hinge screen cloth to mould plastics, make screen cloth and panel compound together, can reduce the panel cracked to a great extent, current hinge screen cloth mainly has following two kinds:

1. the mesh cloth of the woven structure is formed by interweaving warp yarns and weft yarns which are arranged vertically to each other or twisting the warp yarns with each other and interweaving the weft yarns, and the hinge part is folded to store a certain amount of yarns. The yarns at the interweaving points of the mesh cloth can slide when the mesh cloth is subjected to external force, so that the density and the shape of the mesh cloth are changed, and the stability of the mesh cloth is very important because the mesh cloth needs to bear high temperature, pressure, fluid movement and the like in the injection molding process. In order to solve the problem, the prior product is used for coating resin on the mesh cloth before injection molding, so that the warp and weft yarns at the interweaved part of the mesh cloth are bonded together;

2. the mesh cloth of warp knitting structure comprises mesh cloth region and hinge region, and mesh cloth region and hinge region are connected by the yarn winding or hooking mode that the powerful is higher and the yarn of powerful is lower, and when air bag blasting, the lower yarn of powerful breaks in the hinge region, and powerful yarn break away from powerful lower constraint and straighten, play certain cushioning effect. According to the characteristics of warp knitting and weaving, two or more groups of yarns with lower strength are generally arranged in the mesh fabric, and when the safety air bag is exploded, the yarns with lower strength are straightened firstly and then elongated and then broken by external force, so that it is difficult to ensure that all the yarns with lower strength are broken simultaneously and the yarns with higher strength are straightened simultaneously, and the consumption of the yarns with higher strength is greatly increased when the hinge area bears the strength of the safety air bag during the explosion;

for this reason, those skilled in the art have proposed a hinge screen cloth of an automobile airbag with a weft knitting structure to solve the problems proposed in the background art.

Disclosure of Invention

In order to solve the technical problems, the invention provides an automobile safety airbag hinge screen cloth with a weft knitting structure, which solves the problems in the prior art.

The utility model provides an automobile safety airbag hinge screen cloth of weft knitting structure, includes the screen cloth, the screen cloth includes first group yarn and second group yarn, first group yarn and second group yarn weave plain stitch liner organization into the screen cloth through the yarn.

Preferably, the first set of yarns uses ground yarns of lower tenacity and is woven into a loop.

Preferably, the second set of yarns is a high tenacity spacer yarn and is woven into tucks and floats.

Preferably, the yarn laying ratio of the second set of yarns when laid is 1:1,1:2,1:3, one of the following.

Preferably, the mesh cloth can be woven on a 5-12 needle computerized flat knitting machine.

A weaving method of an automobile safety airbag hinge screen cloth with a weft knitting structure comprises the following steps:

firstly, selecting a first group of yarns with enough length, and weaving the first group of yarns into a coil;

selecting a second group of yarns with sufficient length, weaving the second group of yarns into tucks and floats, and passing the second group of yarns through the first group of yarns;

and thirdly, finally finishing the weaving of the hinge screen cloth of the automobile safety airbag.

Compared with the prior art, the invention has the following beneficial effects:

1. when the air bag is exploded, the loops woven by the first group of yarns are broken and dispersed simultaneously due to the characteristics of weft knitting tissues, so that the straightening time of the second group of yarns is greatly reduced, and the second group of yarns can be straightened simultaneously and bear strong force.

2. The mesh fabric can be woven on a 5-12-needle computerized flat knitting machine, and has the advantages of wide raw material applicability, high production efficiency, large meshes and convenience in injection molding.

Drawings

FIG. 1 is a schematic view of a mesh of the woven structure of the present invention;

FIG. 2 is a schematic view of a warp knit structure of the present invention;

FIG. 3 is a schematic view of a plain needle cushion of the present invention;

FIG. 4 is a schematic view of a plaiting stitch of a knitting plain of the present invention;

FIG. 5 is a schematic view of a hinge region attachment of a web in accordance with the present invention;

fig. 6 is a schematic view of a second set of yarn weave plain stitch according to the invention.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.

As shown in fig. 3 to 6:

embodiment one: the invention provides an automobile safety airbag hinge mesh cloth with a weft knitting structure, which comprises a mesh cloth, wherein the mesh cloth comprises a first group of yarns 1 and a second group of yarns 2, as shown in figure 3, the first group of yarns 1 and the second group of yarns 2 are woven into a mesh cloth through flat needle lining, the first group of yarns 1 adopt ground yarns with lower strength and are woven into coils, and the second group of yarns 2 adopt lining yarns with higher strength and are woven into tucks and floats.

First, a first group of yarns 1 with enough length is selected, then the first group of yarns 1 is knitted into loops, then a second group of yarns 2 with enough length is selected, then the second group of yarns 2 is knitted into tuck loops and floats, and the yarns pass through the first group of yarns 1, and finally the knitting of the hinge screen cloth of the automobile safety airbag is completed.

From the above, when the air bag is exploded, the loops woven by the yarns 1 of the first group break and are scattered at the same time due to the characteristics of weft knitting structures, so that the straightening time of the yarns 2 of the second group is greatly reduced, and the yarns 2 of the second group can be straightened at the same time and bear strong force.

Specifically, the yarn laying ratio of the second group of yarns 2 at the time of laying is 1:1,1:2,1:3, one of the following.

From the above, the second set of yarns 2 can be adjusted to have a yarn laying ratio of 1 when laying up: 1,1:2,1:3, further changing the straightening length of the mesh cloth.

Embodiment two: this embodiment is substantially the same as the previous embodiment except that the mesh cloth may be woven on a 5-12 needle computerized flat knitting machine.

From the above, the mesh cloth can be woven on a 5-12-needle computerized flat knitting machine, and has the advantages of wide raw material applicability, high production efficiency, large meshes and convenience in injection molding.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples, to illustrate the practical effects of the present invention:

the first group of yarns 1 and the second group of yarns 2 are knitted into plain stitch yarn plaiting structures as shown in fig. 4, as shown in fig. 5, the plain stitch plaiting structures of the first group of yarns 1 and the second group of yarns 2 are connected with AC as a hinge area, as shown in fig. 6, the second group of yarns 2 are knitted into plain stitch plaiting structures, when in injection molding, the mesh can bear high temperature, pressure and fluid movement, the structure is stable, and when the air bag is exploded, due to the characteristics of weft knitting structures, loops knitted by the first group of yarns 1 are broken and scattered, the time for straightening the second group of yarns is greatly reduced, so that the second group of yarns 2 can be straightened simultaneously and bear strong force, and meanwhile, the mesh can be knitted on a 5-12-needle computerized flat knitting machine, and has wide applicability of raw materials, high production efficiency, large meshes and convenient injection molding.

While embodiments of the present invention have been shown and described above for purposes of illustration and description, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (6)

1. An automobile safety airbag hinge screen cloth with a weft knitting structure is characterized in that: the yarn knitting machine comprises a mesh, wherein the mesh comprises a first group of yarns (1) and a second group of yarns (2), and the first group of yarns (1) and the second group of yarns (2) are knitted into the mesh through yarn knitting plain needle liners.

2. A weft-knitted automotive airbag hinge web as set forth in claim 1, wherein: the first group of yarns (1) adopts ground yarns with lower strength and is knitted into a coil.

3. A weft-knitted automotive airbag hinge web as set forth in claim 1, wherein: the second group of yarns (2) adopts lining yarns with higher strength and is woven into tuck loops and floats.

4. A weft-knitted automotive airbag hinge web as set forth in claim 1, wherein: the yarn laying ratio of the second group of yarns (2) during the laying is 1:1,1:2,1:3, one of the following.

5. A weft-knitted automotive airbag hinge web as set forth in claim 1, wherein: the mesh cloth can be woven on a 5-12-needle computerized flat knitting machine.

6. A method of knitting a weft-knitted automotive airbag hinge web according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:

firstly, selecting a first group of yarns (1) with enough length, and weaving the first group of yarns (1) into a coil;

selecting a second group of yarns (2) with sufficient length, weaving the second group of yarns (2) into tucks and floats, and passing the second group of yarns through the first group of yarns (1);

and thirdly, finally finishing the weaving of the hinge screen cloth of the automobile safety airbag.