KR20160070854A - Fiber opening apparatus of carbon fiber a using guide rollers - Google Patents

Abstract

The present invention provides a fiber opening apparatus for a fiber bundle including guide rollers, the apparatus maintaining fiber width of opened fiber by including the guide rollers located over an extension rod at a predetermined distance in the vertical direction so as to supply carbon fibers to a supply roller and by upwardly moving the carbon fibers supplied from the extension rod by a predetermined angle in order to prevent opened carbon fibers from being agglomerated before the carbon fibers are supplied from the extension rod to the supply roller. Thus, not only the phenomenon in which fiber bundles agglomerate together at a predetermined portion in the opened carbon fibers is prevented, but also the decrease in fiber weight variation for each position of a final prepreg product and gap generation are prevented, by dispersing the opened fibers in a uniform distribution, thereby having an effect of improving quality.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a carding machine for a fiber bundle,

The present invention relates to a carding machine for a fiber bundle, and more particularly, to a carding apparatus for a fiber bundle, more specifically, by providing an entering angle to a feeding roller before the impregnation process, the carbon fiber is supplied, The present invention relates to a carding machine for a fiber bundle equipped with guide rollers.

Prepreg refers to a fiber-reinforced thermoplastic resin composite in which fibers are impregnated with a thermoplastic resin and then semi-cured. Because of its light weight and excellent mechanical properties, it is widely used in various industrial fields such as aircraft, automobile parts, sports, and leisure.

Usually, a carbon fiber, a glass fiber, or an aromatic polyamide fiber or the like is used in the production of the prepreg. A plurality of bundles of reinforcing fibers made by arranging a plurality of single fibers of carbon fiber or glass fiber are arranged in parallel to each other, A thermosetting resin such as resin or unsaturated polyester is impregnated into a sheet.

In this case, before the thermosetting resin is impregnated into the reinforcing fiber, an opening process is performed on the reinforcing fiber. The thickness of the reinforcing fiber is reduced by opening the reinforcing fiber flow rate so that the thermosetting resin is sufficiently impregnated between the single fibers in the reinforcing fiber need.

The carbon fiber opening technique known so far is disclosed in Japanese Laid-Open Patent Nos. 2006-257593, 2006-297889 and US20030057585, in which a fiber is fed at a constant speed and a plurality of annular rods or rotating balls oscillated in the axial direction are passed A method of opening the fiber, a method of opening the fiber by vibrating a single roller while passing the fiber through a free-rotating roll while a certain tension is applied, a method of preheating the inside of the carbon fiber, And a carding method. However, a large number of rollers are required for carding, and in the case of the fixed roller passing method, there is a disadvantage in that the fiber friction becomes large, and a lot of mounds are generated due to damage of the fiber surface.

In order to solve these drawbacks, as shown in Fig. 1, in the registered patent application No. 10-1180504 filed by the applicant of the present application, the number of rollers 1 and 2 necessary for carding using the air injection device 3 Which is capable of satisfying all of the tension and speed conditions during carding of the carbon fiber 100 while minimizing the amount of the carbon fiber.

In addition, as shown in FIG. 2, the application No. 10-2014-0091758 filed by the present applicant discloses that a plurality of vibrating rollers 200 and an air injecting apparatus 200 vibrating at different frequencies are installed in a carding machine Thereby dispersing the open fibers in a more uniform distribution.

On the other hand, Prepreg is an intermediate material of a composite material made of a sheet of resin, which is coated with a resin on the reinforcing fiber. In the process of impregnating the reinforcing fiber with the resin, the prepreg is thinned, And researches to reduce and eliminate defective parts are actively taking place.

(Patent Document 1) Japanese Patent Application No. 10-1180504, filed by the present applicant, discloses a carbon fiber carding apparatus using an air injection system. (Patent Document 2) Japanese Patent Application No. 10-1179379 filed by the present applicant discloses a prepreg manufacturing method and apparatus. (Patent Document 3) Application No. 10-2014-0091758, which was filed by the present applicant, discloses a carding machine for a fiber bundle using a vibrating roller and an air spray.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a guide roller which is vertically spaced apart from the tension rod by a predetermined angle, The present invention is directed to a carding machine for a fiber bundle having a guide roller for preventing an unfolded carbon fiber from being re-agglomerated to maintain an open width.

According to another aspect of the present invention, there is provided a carding machine for a fiber bundle including a guide roller, wherein the carbon fiber bobbin from which the carbon fiber is wound is provided with a carbon fiber, A tensile rod which pulls the carbon fibers to be stretched; A supply roller for supplying a protective film to be coated on the upper and lower surfaces of the carbon fibers; The feeding roller is provided at a stage before the carbon fiber advancing in the tension rod is introduced into the feeding roller, and the carbon fiber is prevented from being re-agglomerated before being fed to the feeding roller, A guide roller for holding an angle of entry of the carbon fibers into the guide rollers; And a control unit.

And the guide roller is positioned so that an entry angle at which the feed roller enters is 3 ° to 5 °.

According to the carding machine for fiber bundles provided with the guide rollers of the present invention, the guide rollers are disposed at regular intervals above the tension rods in the vertical direction, so that the carbonized fibers before the carbon fibers are fed from the tension rods to the feed rollers It is possible to prevent the phenomenon of re-aggregation and to maintain the open mouth.

Therefore, it prevents the bundle of fiber bundles from being re-agglomerated at a certain portion of the carded carbon fiber, thereby maintaining the open width and reducing the fiber weight deviation according to the position of the final prepreg product, have.

Further, the guide rollers according to the present invention can be assembled and assembled without using any complicated equipment by using existing facility facilities, so that it is easier to separate and assemble to improve work efficiency.

1 is a schematic view showing a conventional carding machine for carbon fibers.
2 is a schematic view showing a conventional carding machine for carbon fiber.
3 is a schematic view showing a carding machine for a fiber bundle having a guide roller according to the present invention.
Fig. 4 is a schematic view showing the guide roller of Fig. 3; Fig.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

First, the carding machine applied to the present invention uses the structure and names and reference numerals shown in the drawing of FIG. 2 for the sake of convenience.

Therefore, as shown in FIG. 3, the apparatus for manufacturing a fiber bundle to which the present invention is applied has a structure in which a carbon fiber is loosened from a carbon fiber bobbin 10 on which a carbon fiber 100 as a raw material of a prepreg is wound, And a protective film 40 provided on the upper and lower surfaces of the carbon fibers 100 to supply the carbon fibers 100. The tension bar 30 is provided as a crusher 20 for pulling the carbon fibers 100 supplied from the cri- A roller 50 and a take-up roller 80 for winding a prepreg produced on the opposite side of the krill 20 and at least one pair of impregnations provided between the krill 20 and the take- A roller 70 and a heater 60 for heating the carbon fiber 100 on which the protective film 40 is wound before the impregnating roller 70. [

The protective film 40 may be applied to only one side of the upper surface or the lower surface of the carbon fiber 100. The impregnation roller 70 may impregnate the carbon fiber 100 with the protective film 40 by heating and pressing , And a plurality of them may be installed so as to face each other up and down.

The tensile rod 30 feeds the carbon fibers 100 wound on the krill 20 to the impregnating roller 50 while being pulled in such a manner that there is no overlap and gap and the supply roller 10 is provided on the upper and lower surfaces of the carbon fiber 100, The protective film 40 supplied through the protective film 40 is coated.

The carbon fibers 100 and the protective film 40 are sequentially passed between the heater 60 and the impregnation roller 70. The heater 60 and the impregnation roller 70 are heated and pressurized The resin of the protective film 40 is impregnated on the upper and lower surfaces of the carbon fibers 100.

After the impregnation of the resin into the carbon fibers 100 is completed, the protective film 40 on the upper surface is formed into a prepreg, and the protective film 40 is separated from the prepreg, And is wound by the winding roller 80 together with the legs.

The tensile rods 30 are pulled in such a manner that they do not overlap with the overlapping of the carbon fibers 100 wrapped around the krill 20. The carbon fibers 100 are supplied to the tensile rods 30 A phenomenon may occur in which the entire fiber bundles are bundled together to increase the fiber weight deviation.

Therefore, in order to prevent the carbon fiber 100 from being re-agglomerated, the present invention is characterized in that before the carbon fiber 100 advancing in the tension bar 30 enters the feed roller 50, And a guide roller (400) is provided on the guide roller.

The guide roller 400 prevents the carbon fibers 100 from being re-agglomerated before the carbon fibers 100 are fed from the tension rods 30 to the feed roller 50, And has a function of maintaining the entry angle of the carbon fibers 100 in the roller 50. [

5, the guide roller 400 is positioned on the upper side of the tension rod 30 at a predetermined interval in the vertical direction, so that the carbon fibers 100 supplied from the tension rod 300 ) At a predetermined angle to supply the toner to the supply roller (50).

In this case, since the guide roller 400 is provided, the angle of entry A entering the feed roller 50 is preferably 3 ° to 5 °. When the entering angle A is less than 3 degrees, the tensile force is lowered and the fiber bundles of the carbon fiber 100 are aggregated, resulting in a gap between the fibers and the fibers. When the fiber bundle enters at an angle exceeding 5 DEG, the openability of the fiber bundle is lowered due to the high tensile force, which causes a gap and a drawback due to friction.

Eight sheets of carded carbon fibers were laminated on a flat plate by applying the guide roller according to the present invention and heated and cured in an oven at 80 DEG C for 25 minutes and at 120 DEG C for 120 minutes to prepare a prepreg structure. The canvas ratio of the prepreg structure manufactured using the orthopedic was measured.

Comparison of dog islands division Dogfish Example (Carding machine with guide rollers) 16.5 Comparative Example (conventional carding machine) 16

In the carding machine according to an embodiment of the present invention, the carding ratio is preferably 12 or more. When the width of the reinforcing fiber bundle before opening is b1 (mm), the thickness is a1 (탆), the width of reinforced fiber bundle after opening is b2 (mm), and the thickness is a2 (탆) b2 / a2) / (b1 / a1).

As shown in Table 1, when the guide roller according to the present invention is applied to the conventional carding machine, the carding effect is enhanced.

In summary, the carbon fiber carding machine according to the present invention has a phenomenon that bundles of fibers are gathered together at a certain portion of the carded carbon fibers supplied to the tension bar 30, As a result, the carbonized fiber is prevented from aggregating again, thereby maintaining the open width of the fiber, thereby reducing the deviation in fiber weight and improving the quality of the final prepreg.

An air spray 300 for receiving the carbon fibers 100 from the plurality of vibration rollers 200 at the previous stage of the tension rod 30 and opening the fiber bundles of the carbon fibers 100 more widely and uniformly, May be provided.

This is because the plurality of vibrating rollers 200 and the air sprays 300 can be used as they are before the tension rod 30 without installing any complicated equipment using the conventional carding machine, ) Can be more easily assembled and separated, thereby increasing the working efficiency.

The embodiment of the fiber bundle carding apparatus provided with the guide roller of the present invention described above is merely an example and those skilled in the art will appreciate that various modifications and equivalent implementations You can see that examples are possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10: carbon fiber bobbin 20: krill
30: tensile rods 40: protective film
50: feed roller 60: heater
70: Impregnating roller 80: Winding roller
100: carbon fiber 400: guide roller

Claims (2)

In a carding machine for a fiber bundle,
A tensile rod 30 provided with a carbon fiber loosened from the carbon fiber bobbin 10 wrapped with the carbon fiber 100 and provided to the cryler 20 and pulling the carbon fiber 100 supplied from the cryler 20 tightly;
A supply roller 50 for supplying a protective film 40 to be coated on the upper and lower surfaces of the carbon fibers 100;
The carbon fibers 100 advancing in the tension rod 30 are provided at the stage before entering the feed roller 50 and the carbon fibers before being fed to the feed roller 50 are reunited A guide roller (400) for maintaining the entry angle of the carbon fiber (100) to the feeding roller (50) for maintaining the open width of the carbon fiber (100);
And a guide roller for guiding the webbing of the fiber bundle. The method according to claim 1,
The guide roller (400)
And an entry angle to enter the feeding roller (50) is set to be 3 to 5 degrees.

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