KR20220023733A - Fiber composite manufactured using stitching and method for manufacturing the same - Google Patents

Abstract

Disclosed are a fiber composite material produced using a backstitch, which can improve productivity due to a simple manufacturing process and increase the structural strength of a fiber composite material, and a method for producing the same. The fiber composite material according to the present invention comprises: a sheet main body that is formed by stacking up a plurality of reinforcing fiber sheets made of at least one among a carbon fiber, a glass fiber, and a Kevlar fiber; backstitch threads that are done with backstitching so as to allow the reinforcing fiber sheets constituting the sheet main body to be fixed in a stacked state; and a resin impregnated into the sheet main body backstitched by the backstitch threads.

Description

Fiber composite manufactured using stitching and method for manufacturing the same. {Fiber composite manufactured using stitching and method for manufacturing the same}

The present invention relates to a fiber composite, and more particularly, to a fiber composite manufactured using a backstitch and a method for manufacturing the same.

Fiber composites have excellent strength, rigidity and durability, and are widely used in various industries such as aircraft structural members, automobile exterior plates, wind turbine blades, bicycle frames, and fishing rods.

The fiber composite material may be manufactured by impregnating a synthetic resin into a woven sheet by arranging reinforcing fibers such as carbon fiber, glass fiber, or kevlar fiber in multiple rows and columns. In this case, the fiber composite material may have various mechanical properties by varying the pattern in which the reinforcing fibers are woven or by laminating a plurality of reinforcing fiber sheets. In order to make a fiber composite by laminating woven carbon fibers, sheets woven by carbon fibers, glass fibers, Kevlar fibers, etc. are laminated, and a separate means is required for laminating them.

Republic of Korea Registration No. 10-0563130 discloses a carbon fiber base material for reinforcing, a laminating agent, and a detection method. In the published carbon fiber base material, carbon fiber and metal wire are integrated to form a sheet-like carbon fiber base material having a structure selected from fabric, two-sheet, and prepreg, and the metal wire is the same with respect to the orientation direction of the carbon fiber They are arranged in the direction or at an angle, and the volume ratio of the metal wire to the carbon fiber is 4% or less.

In addition, the Republic of Korea Utility Model Publication No. 2013-005578 discloses a heating carbon fiber woven body having a resistance value range of carbon yarn, and Republic of Korea Patent No. 10-0980186 discloses a carbon fiber binder and a composite material using the same.

Korean Patent Registration No. 10-1931030 discloses 'a carbon fiber composite material reinforced with fibers in the thickness direction and a method for manufacturing the same', which binds a plurality of reinforcing fiber sheets using a binder and increases the strength in the thickness direction at the same time. has been

However, the method for manufacturing a fiber composite material has a problem in that productivity is low because it is necessary to manufacture a separate binding member as well as to combine each individually.

Republic of Korea Patent Registration No. 10-1931030 Carbon fiber composite material with reinforced fibers in the thickness direction and method for manufacturing the same

The present invention is to improve the above problems, and can be sewn in a state where carbon fibers are stacked, and can be sewn using a plurality of sacrificial fibers, that is, carbon fiber, glass fiber or Kevlar fiber, so that the An object of the present invention is to provide a fiber composite material manufactured using a backstitch capable of improving productivity and a method for manufacturing the same.

In order to solve the above technical problem, the fiber composite material manufactured using the stitching of the present invention includes a sheet body formed by laminating reinforced fiber sheets made of at least one of carbon fiber, glass fiber, and Kevlar fiber, and forming the sheet body It is characterized in that it includes a backstitch yarn stitched so that the reinforcing fiber sheets can be fixed in a stacked state, and a resin impregnated in the sheet body portion sewn by the backstitch yarn.

In the present invention, the backstitch yarn is made of a selected one of carbon fiber, glass fiber, and Kevlar fiber, and the resin is impregnated into the sheet body by being coated on the outer circumferential surface of the backstitch yarn.

The manufacturing method of the fiber composite material using the backstitch of the present invention for achieving the above object includes a sheet body part manufacturing step of forming a sheet body part by laminating reinforced fiber sheets made of at least one of carbon fiber, glass fiber, and Kevlar fiber;

A stitching step of fixing the laminated state of the reinforcing fiber sheets by stitching the sheet body in which the reinforcing fiber sheets are laminated by the sheet body manufacturing step using a stitching yarn;

and an impregnation step in which the resin is impregnated into the sheet body by the resin supplied during the backstitching.

As described above, in the fiber composite material manufactured using the stitching according to the present invention and the method for manufacturing the same, the production of the fiber composite material for the product formed by laminating reinforcing fiber sheets is simple, thereby improving productivity, and fiber wood composite material. can improve the structural strength of

1 is a perspective view showing a fiber composite material manufactured using a backstitch according to an embodiment of the present invention;
2 and 3 are perspective views showing examples of the sewn state for the manufacture of the fiber composite material manufactured using the stitching.
4 is a block diagram showing a method of manufacturing a fiber composite material manufactured using a backstitch according to the present invention.

The present invention relates to a fiber composite material manufactured using a backstitch and a method for manufacturing the same, and examples thereof are shown in FIGS. 1 to 4 .

Referring to the drawings, the fiber composite material 10 manufactured using the backstitch according to the present invention has a structure in which reinforcing fiber sheets are stacked, sewn and fixed, and the resin is impregnated.

To explain this in more detail, the fiber composite material manufactured using the backstitch 10 is glass fiber, carbon fiber, graphite fiber, metal fiber, aramid fiber, ultra high molecular weight PE (Ultra High Molecular Weight Polyethylene), Pan (Polyacrylonitrile) A sheet body 20 is provided by stacking reinforcing fiber sheets 21 made of fiber, arylaid fiber, PEEK (Poly Ether Ether Ketone) fiber, rayon fiber, basalt fiber, or a mixture of these fibers. In the sheet body 20, the reinforcing fiber sheets 21 are laminated, and it is preferable to install the woven fibers so that the grains of the woven fibers are crossed or inclined at a predetermined distance from each other or are staggered.

And the backstitch yarn 30 is installed in the sheet body part 20 on which the reinforcing fiber sheet 21 is laminated so that the reinforcing fiber sheets 21 can be fixed in a stacked state, and the backstitch yarn 30 The sheet body part 20 and the backstitch yarn 30 sewn by the stitching have a structure impregnated with the resin 40 .

The backstitch yarn 30 is glass fiber, carbon fiber, graphite fiber, metal fiber, aramid fiber, high molecular weight PE (Ultra High Molecular Weight Polyethylene), Pan (Polyacrylonitrile) fiber, arylaid fiber, PEEK (Poly Ether Ether Ketone) Fiber, rayon fiber, basalt fiber, or a mixture of these fibers may be used. However, the present invention is not limited thereto. For example, it may be made of a metal thread.

And the supply of the resin impregnated in the sheet body 20 and the backstitch yarn 30 may be made by coating the outer peripheral surface of the backstitch yarn 30 with resin, and forming a hollow in the needle of the sewing machine for the backstitching, and through this The resin may be supplied while the stitching is taking place. However, the present invention is not limited thereto, and the resin supply to the sheet body 20 may be separately applied or fused.

The fiber composite material prepared as described above can be molded into a predetermined product by heating and pressing at the same time.

On the other hand, the method of manufacturing a fiber composite material using a backstitch includes a sheet body part manufacturing step 100 of stacking reinforcing fiber sheets made of at least one of carbon fiber, glass fiber, and Kevlar fiber to form a sheet body part (100), and a sheet body part manufacturing step (100). ), the stitching step 110 of fixing the laminated state of the reinforcing fiber sheets by stitching the sheet body part on which the reinforcing fiber sheets are laminated by using the backstitch yarn, and the backstitching apple double stitching the sheet body 20 and an impregnation step 120 in which the resin is impregnated into the sheet body by the resin supplied during the resin stitching.

The impregnation step may be performed by impregnating the sheet body with a resin coated on the backstitch yarn or by using a resin supplied through a hollow formed in a needle for backstitching. When the hollow part is formed in the stitching needle, it may be composed of a separate means for supplying the resin to the hollow part, that is, a resin supply pump, and a resin supply pipe connecting the hollow part of the needle with the resin supply pump.

The fiber composite material manufactured as described above may further include a molding step 130 of heating and pressing to a predetermined temperature to form a predetermined shape. The forming step may be performed by being pressed by a mold having a predetermined shape inside the heated fluid.

The fiber composite material manufactured using the stitching according to the present invention configured as described above and the method for manufacturing the same include stacking reinforcing fiber sheets 21, stitching them together to bind them, and impregnating the resin with a sensitized fiber sheet having a predetermined thickness. That is, the fiber complex material can be freely molded to a desired thickness, and productivity can be improved by reducing the man-hours required for its manufacture.

In particular, since the fiber composite material of the present invention stacks the reinforcing fiber sheets alternately and is fixed with the bargeum yarn, it does not have the directionality according to the weaving of the reinforcing fiber sheet as in the prior art. It is possible to fundamentally prevent poor bonding and bonding, and it is easy to maintain a predetermined shape.

Although the present invention has been described with reference to the embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will have to be determined by the technical spirit of the appended claims.

Claims (6)

A sheet main body formed by stacking reinforcing fiber sheets made of at least one of carbon fiber, glass fiber, and Kevlar fiber, and a backstitch yarn in which the reinforcing fiber sheets constituting the sheet body can be fixed in a stacked state, and the backstitch yarn A fiber composite material manufactured using a backstitch, characterized in that it contains a resin impregnated in the sheet body part stitched by the According to claim 1,
The backstitch yarn is a fiber composite material manufactured using a backstitch, characterized in that it is made of one selected from carbon fiber, glass fiber, and Kevlar fiber. The method of claim 1,
The resin is a fiber composite material manufactured using the backstitch yarn, characterized in that the resin is impregnated in the sheet body by being supplied by being coated on the outer circumferential surface of the backstitching yarn. A sheet body part manufacturing step of stacking reinforcing fiber sheets made of at least one of carbon fiber, glass fiber, and Kevlar fiber to form a sheet body part;
A stitching step of fixing the laminated state of the reinforcing fiber sheets by stitching the sheet body in which the reinforcing fiber sheets are laminated by the sheet body manufacturing step using a stitching yarn;
A method of manufacturing a fiber composite material using a backstitch, characterized in that it includes an impregnation step of impregnating the sheet body with the resin supplied during the backstitching. 5. The method of claim 4,
The impregnation step is a method of manufacturing a fiber composite material using a backstitch, characterized in that the sheet body is impregnated with a resin coated on the backstitch. 5. The method of claim 4,
The impregnation step is a method of manufacturing a fiber composite material using a backstitch, characterized in that it is made by the resin supplied through the hollow formed in the needle for the backstitch.

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