KR100404075B1 - Method of manufacturing center stitched prepreg to prevent deformation of tape from being deformed in wrapping process - Google Patents

Abstract

PURPOSE: A method of manufacturing a center stitched prepreg is provided to prevent dimensions of a tape from being deformed in a wrapping process, which improves adhesion of the tape and maintains stability of a heat-resistant composite. CONSTITUTION: After a carbon fiber fabric(28) is made using a carbon fiber, the carbon fiber fabric is passed through a tank(30) to make a prepreg(2). A Kevlar fiber is sewn to a center of the prepreg to prevent the tape from being deformed due to tension or heat. Both ends of the prepreg are cut at an angle of 45 degrees, and the cut ends are wound around a winding roller. When a receiving roller having a mold is operated, the prepreg is transferred from the winding roller.

Description

Manufacturing method of center stitch prepreg to prevent tape deformation

The present invention relates to a center stitched prepreg for preventing tape deformation. In particular, the present invention relates to a center stitched prepreg. And, at the same time, to a center stitch prepreg for preventing tape deformation, such that the safety of the composite structure and the heat-resistant composite can be maintained.

In general, prepregs are special tapes used in high temperature heat shielding systems to effectively block much of the heat coming in from the outside so that rockets or aircraft can function properly and protect them from high temperatures.

Conventionally, as shown in Figure 3, the woven carbon fiber fabric was passed through a tank filled with a resin solution to prepare a prepreg 102, in this state as shown in (A) The tip was cut at a 45 degree angle and wound around a winding roller.

When the prepreg 102 wound on the winding roller is supplied to a receiving roller equipped with a mold, the width and length of the virtual line must be maintained as shown in (b). As a result, the prepreg 102 is deformed by increasing its length and decreasing its width.

Therefore, the adhesiveness of the tape wound on the mold installed in the receiving roller is inferior, and thus there is a problem in that the safety of the composite structure and the heat-resistant composite is poor.

Accordingly, the present invention has been made in order to solve the above problems, the object is to prevent the length of the prepreg is increased or reduced in width by the tensile force and heat transmitted, to improve the adhesion and safety more have.

1 is a schematic diagram showing an embodiment of the present invention.

2 is a state diagram of the present invention formed on the prepreg.

3 (a) and 3 (b) are states before the conventional prepreg is wrapped and after the wrapped.

※ Explanation of code for main part of drawing

2: pre-preg 4: winding roller 6: first guide roller

8: 2nd guide roller 10: 3rd guide roller 12: tension roller

14: 4th guide roller 16: carriage head 18: rod

20: Hot blower 22: Cool blower 24: Receipt roller

26: support 28: carbon fiber fabric 30: tank

32: resin solution

In order to realize this, the present invention is to form a prepreg by passing the tank in which the resin solution is stored through the carbon fiber fabric, the kabla fiber for preventing the length and width from being deformed due to the heat and tensile force transmitted to the prepreg Are sewn.

Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

As shown in FIG. 1, a winding roller 4 in which the prepreg 2 is wound is constituted, and a guide for guiding the prepreg 2 to a position spaced apart from the winding roller 4 by a predetermined distance. 1, 2 and 3 guide rollers 6, 8 and 10 are sequentially installed.

In addition, a tension roller 12 is provided between the second and third guide rollers 8 and 10 to provide a proper tensile force with respect to the prepreg 2 so as to maintain a firm organizational force.

In addition, the fourth guide roller 14 is positioned at a position spaced apart from the third guide roller 10 by a predetermined distance, and the fourth guide roller 14 provides an action force to flow back and forth. It is coupled to the front end of the rod 18 installed in the carriage head 16.

Subsequently, a hot blower 20 having an upper portion of the fourth guide roller 14 is provided with heat to the conveyed prepreg 2 to realize a high density and at the same time improve adhesion. It is located in the installation.

In addition, a cool blower 22 for supplying low-temperature air to the prepreg 2 passing through the hot blower 20 is installed below the fourth guide roller 14.

In addition, at a position spaced apart from the cool blower 22 by a predetermined distance, a receiving roller 24 which combines a mold is positioned, and the receiving roller 24 is rotatably coupled to a support 26 to be installed. .

At this time, the mold must be able to withstand the pressure and high temperature, and the mold must be made to be demoulded.

On the other hand, the prepreg 2 wound around the winding roller 4, as shown in Fig. 2 is sewn in the center of the capillary fiber 28 to prevent the deformation by the tensile force and heat.

Reference numeral 28 denotes a carbon fiber fabric, 30 a tank, and 32 a resin solution.

Referring to the operation of the present invention configured as described above are as follows.

First, a carbon fiber fabric 28 is manufactured using carbon fiber, and the carbon fiber fabric 28 is passed through a tank 30 filled with a resin solution 32 to form a so-called prepreg 2.

After making the prepreg 2 in this manner, a high-strength cabling fiber 28 is prevented from being deformed by the tensile force or heat transmitted during the manufacture of the product. ) Sew in the center.

Then, both end portions of the prepreg 2 are cut at a 45 degree angle and wound on the winding roller 4.

As described above, when the receiving roller 24 with the mold to be manufactured is operated after the work is finished, the prepreg 2 is transferred from the winding roller 4.

At this time, the prepreg 2 is transported through the first and second guide rollers 6 and 8, and at the same time, the prepreg 2 is extended by a predetermined length while passing through the tension roller 12 to maintain proper strength.

Subsequently, when the prepreg 2 passes through the fourth guide roller 14 while being transported through the third guide roller 10, the hot air supplied from the hot blower 20 is prepreg ( It comes in contact with the surface of 2).

In this way, the surface of the prepreg 2 is in a jelly state by the supplied high-temperature air, and the adhesiveness is excellent.

At the same time, the prepreg 2 is brought into contact with the low-temperature air supplied from the cool blower 22, at which time it is wound on a mold coupled to the receiving roller 24 while maintaining adhesiveness and appropriate strength.

Therefore, the prepreg 2 continuously supplied from the winding roller 4 is supplied to a mold coupled to the receiving roller 24, thereby being wound in the form of a product to be manufactured.

When the above operation is finished, the finished product wound on the mold is separated, placed in an autoclave and cured at high temperature and high pressure.

The cured product is then finished in the form of a finished product using a processing machine.

As described above, the present invention prevents the prepreg from increasing in length or decreasing in width due to the tensile force and heat transmitted, thereby improving the adhesion and stability.

Claims (1)

Manufacturing carbon fiber fabric 28 using carbon fiber, Passing the carbon fiber fabric 28 through a tank 30 containing a resin solution, and Center stitched to prevent tape deformation, comprising the steps of sewing the Kevlar fiber 28 along the center of the carbon fiber fabric such that the length and width are not deformed due to heat and tension. prepreg) manufacturing method.