KR102045308B1 - Fiber-reinforced composite material and manufacturing device and manufacturing method thereof - Google Patents

Abstract

An apparatus for producing a fiber reinforced composite material according to the present invention is an apparatus for manufacturing a fiber reinforced composite material in which resin is impregnated into a reinforcing fiber. Extruder, the soft sheet discharged from the extruder passes through a pair of cog wheels, the processing unit for transforming the reinforcing fibers in the flexible sheet into a wave form and is installed at the end of the processing unit to block the movement of the soft sheet or , A cutting part for cutting the soft sheet to a predetermined length.

Description

FIBER-REINFORCED COMPOSITE MATERIAL AND MANUFACTURING DEVICE AND MANUFACTURING METHOD THEREOF}

The present invention relates to a fiber-reinforced composite material, a manufacturing apparatus and a manufacturing method thereof, and more particularly, to a fiber-reinforced composite material, a manufacturing apparatus and a manufacturing method for producing a composite material impregnated with long fibers.

In general, composite materials such as fiber-reinforced plastics are light and high rigidity materials, and are manufactured by inserting reinforcing fibers having high tensile strength into a low-density thermoplastic resin.

At this time, the composite material using the long fiber of about 10 ~ 50mm length as the reinforcing fiber has anisotropy according to the arrangement direction of the fiber, that is, the difference in the rigidity according to the direction.

For example, CFRTPC (Continuous Fiber-Reinforced ThermoPlastic Composite) manufactured by orienting reinforcing fibers in one direction and then impregnating the resin has a higher rigidity to withstand the force applied in the same direction as that of the reinforcing fibers. The force applied in the direction perpendicular to the direction of the reinforcing fiber has a problem that is easily broken.

In order to solve this problem, conventionally, a composite material having high rigidity in various directions was manufactured by weaving a kind of fabric using reinforcing fibers and then impregnating the resin.

However, in order to weave the reinforcing fibers in the form of a fabric, separate processing equipment and processing time are required, and because the weaving and resin impregnation have to be performed in separate processes, there is a problem that the overall process time and cost increase.

Therefore, there is a need for a new plate manufacturing method capable of increasing the direction perpendicular to the direction of the fiber oriented in one direction, in particular, the thickness direction of the plate through a relatively simple process.

The matters described as the background art are only for the purpose of improving the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the related art already known to those skilled in the art.

KR 10-2012-0076325 A (2012.07.09)

The present invention has been made to solve the above problems, and an object of the present invention is to provide a fiber-reinforced composite material, a manufacturing apparatus and a manufacturing method for providing a sheet having a long fiber oriented in the thickness direction by a simple process have.

In order to achieve the above object, a fiber reinforced composite material manufacturing apparatus according to an embodiment of the present invention is a device for manufacturing a fiber reinforced composite material impregnated with a resin in a reinforcing fiber, by mixing a semi-melt resin and a reinforcing fiber Extruder for continuously discharging the soft sheet in the form of a sheet, the soft sheet discharged from the extruder through a pair of cog wheels, the processing portion for transforming the reinforcing fibers in the soft sheet into a wave form and the end of the processing portion Is installed to block the movement of the soft sheet, or includes a cutting portion for cutting the soft sheet to a predetermined length.

The processing unit may include a first cog wheel disposed above the moving path of the soft sheet and in contact with an upper surface of the soft sheet, and a second cog wheel disposed below the moving path of the soft sheet and in contact with a lower surface of the soft sheet. The first gear formed on the first cog wheel may be spaced apart from the second gear formed on the second cog wheel to form a space in which the soft sheet moves.

The processing unit may include a first upper guide and a first lower guide installed between the first cog wheel, the second cog wheel, and the extruder to guide the movement path of the soft sheet, and the first cog wheel and the first cog wheel. It may further include a second upper guide and a second lower guide is installed between the two gears and the cutting portion to guide the movement path of the soft sheet.

The first gear and the second gear may be formed in a widthwise length longer than the widthwise length of the soft sheet.

The cut portion may be a blade shape for cutting the soft sheet deformed in the processing portion to a predetermined length while opening and closing.

The second upper guide and the second lower guide may be spaced apart from each other in the thickness direction of the soft sheet, and may be spaced apart from each other at a larger interval than the thickness of the soft sheet discharged from the extruder.

The extruder, the reinforcing fibers can be oriented in a direction parallel to the direction in which the soft sheet is discharged.

It may further include a conveyor for conveying while curing the soft sheet cut by the cutting unit.

On the other hand, the method of manufacturing a fiber-reinforced composite material is a method of manufacturing a fiber-reinforced composite material impregnated with a resin in the reinforcing fibers, the first step of producing a soft sheet in which the reinforcing fibers are oriented in one direction in the semi-melt resin, A second step of deforming the reinforcing fibers into a wave shape and a third step of flattening the surface of the soft sheet while passing the soft sheet through a pair of cog wheels.

In the third step, the semi-melt resin included in the soft sheet may flow to fill the bone of the reinforcing fiber deformed into a wave shape to planarize the surface of the soft sheet.

After the third step, it may further comprise a fourth step of cutting the soft sheet to a predetermined length and curing the resin.

On the other hand, the fiber-reinforced composite material is a fiber-reinforced composite material produced by passing a sheet impregnated with a resin in the reinforcing fibers between a pair of cog wheels, a plurality of flat parts oriented in the thickness direction and the flat parts adjacent to each other It is divided into bent portions connecting, and includes a resin impregnated to surround the reinforcing fibers and the reinforcing fibers formed in a wave shape.

According to the fiber-reinforced composite material, a manufacturing apparatus and a manufacturing method according to the present invention has the following effects.

First, the reinforcing fibers can be increased in the thickness direction of the fiber-reinforced composite material oriented in one direction.

Second, the productivity is high because it can be applied to a continuous process using a continuous fiber.

Third, the thickness direction stiffness can be increased without an additional lamination process.

1 is a side cross-sectional view of a fiber-reinforced composite prepared in accordance with an embodiment of the present invention,
2 is a view of the fiber reinforced composite material manufacturing apparatus according to an embodiment of the present invention,
Figure 3 is an enlarged view of the processing portion of the fiber reinforced composite material manufacturing apparatus according to an embodiment of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a,” “an,” and “the” include plural forms as well, unless the phrases clearly indicate the opposite. As used herein, the term "comprising" embodies a particular characteristic, region, integer, step, operation, element, and / or component, and other specific characteristics, region, integer, step, operation, element, component, and / or group. It does not exclude the presence or addition of.

Unless defined otherwise, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Commonly defined terms used are additionally interpreted to have a meaning consistent with the related technical literature and the presently disclosed contents, and are not interpreted in an ideal or very formal sense unless defined.

Hereinafter, with reference to the accompanying drawings will be described for the fiber-reinforced composite material, a manufacturing apparatus and a manufacturing method according to a preferred embodiment of the present invention.

1 is a side cross-sectional view of a fiber-reinforced composite material manufactured according to an embodiment of the present invention, Figure 2 is an overall layout of the fiber-reinforced composite material manufacturing apparatus, Figure 3 is an enlarged view of the processing unit.

As shown in Figure 1, the fiber-reinforced composite material 500 to be manufactured in the present invention is inserted into the reinforcing fibers 510 to form a wave shape in the resin 520 in the thickness direction. That is, the reinforcing fibers 510 are divided into flat portions 511 arranged in the thickness direction of the fiber-reinforced composite material 500 and bent portions 512 alternately connected up and down between adjacent flat portions 511. The overall waveform is formed, thereby improving the resistance to the load applied in the thickness direction.

As shown in Figures 1 to 3, the fiber reinforced composite material manufacturing apparatus according to the present invention largely comprises an extruder 100, a processing unit 200 and a cutting unit 300, further comprising a conveyor 400 It can be configured to include.

The extruder 100 is an apparatus for extruding a mixture of a resin 520 in which the resin raw material 110 is melted and a reinforcing fiber 120 released from a plurality of reels to form a soft sheet 501 and continuously discharge it. . At this time, the resin 520 forming the matrix of the soft sheet 501 discharged from the extruder 100 is not completely cured and has some flowability and fluidity while maintaining a semi-melt state.

The reinforcing fibers 510 are oriented in the direction in which the soft sheet 501 is discharged, that is, in the longitudinal direction. The reinforcing fiber 120 is continuously injected into the extruder 100, mixed with the resin 520, and then continuously discharged in the form inserted into the soft sheet 501, and thus the soft sheet 501 is discharged in the longitudinal direction. It is oriented in a parallel direction.

The extruder 100 may have various configurations for impregnating the resin 520 after being dispersed at regular intervals while maintaining the tension of the reinforcing fiber 120.

The processing unit 200 deforms the reinforcing fibers 510 inserted into the soft sheet 501 so as to be oriented in a direction perpendicular to the thickness direction of the soft sheet 501, that is, the length direction in which the soft sheet 501 is discharged. It is for the configuration.

Specifically, the flexible sheet includes a first cog wheel 230 disposed above the moving path of the soft sheet 501 discharged from the extruder 100 and a second cog wheel 240 disposed below the moving path. The first upper guide 211 and the first lower guide 221 for guiding the 501 between the first cogwheel 230 and the second cogwheel 240 in the extruder 100 and the first cogwheel 230 And the second upper guide 212 and the second to guide the movement of the soft sheet 501 passing between the second gear 240 and the shape of the soft sheet 501 into a plate shape and to flatten the surface. The lower guide 222 may further include.

The first upper guide 211 and the first lower guide 212 are installed at the same or similar intervals as the thickness of the soft sheet 501 discharged from the extruder 100 so that the soft sheet 501 has a first cogwheel ( Guided between the 230 and the second cogwheel 240, the second upper guide 212 and the second lower guide 222 to have a gap larger than the thickness of the soft sheet 501 discharged from the extruder 100. The soft sheet 501 deformed into a wave form between the first cog wheel 230 and the second cog wheel 240 is compressed to form a space for forming a plate again.

In this case, the first gear 230 is formed by the first gear 232 is formed in the first body 231 forming the rotation axis, the second gear 240 is the second body 241 forming the rotation axis The second gear 242 is formed in the structure. Since the first gear 232 and the second gear 242 are spaced apart from each other to form a space for the soft sheet 501 to move, the soft sheet 501 is deformed into a waveform while passing therebetween.

The distance between the first gear 232 and the second gear 242 may be formed to be equal to or larger than the thickness of the soft sheet 501 discharged from the extruder 100.

The first cogwheel 230 and the second cogwheel 240 rotate in the same direction as the moving direction of the soft sheet 501 based on the portion in contact with the soft sheet 501. That is, the first gear 230 and the second gear 240 is rotated in the opposite direction to each other while assisting the movement of the soft seat 501, between the first gear 232 and the second gear 242. The soft sheet 501 passing through the space is transformed into a waveform.

The cutting part 300 is installed at the distal end of the processing part 200 to selectively block the movement of the soft sheet 501 or to cut the soft sheet 501 into a predetermined length.

Cutting portion 300 is preferably formed in a blade shape capable of cutting the soft sheet 501 while opening and closing up and down, and should be closed if necessary to block the movement of the soft sheet 501. However, the specific shape of the cutout 300 is not limited thereto, and may be modified if cut is possible while blocking the movement of the soft sheet 501.

The conveyor 400 is configured to cool the transfer of the soft sheet 501 cut by the cutting part 300, thereby curing the resin 520 in the soft sheet 501 to form the fiber-reinforced composite material 500. The method of cooling the soft sheet 501 may be an air cooling method using air, or a method of cooling the conveyor 400 by installing a separate cooling flow path.

On the other hand, the fiber-reinforced composite material manufacturing method according to the present invention, the soft sheet 501 is inserted into the reinforcing fibers 510 oriented in one direction in the resin 520 in the semi-melt state in which the resin raw material 110 is melted It may include a first step of manufacturing, a second step of passing the soft sheet 501 between a pair of cog wheels to deform into a waveform, and a third step of flattening the surface of the soft sheet 501. . In addition, the method may further include a fourth step of cutting the soft sheet 501 into a predetermined length and curing the resin 520 of the soft sheet 501.

In the first step, the reinforcing fiber 120 and the resin raw material 110 are continuously added to the extruder 100, and the extruder 100 is continuously extruded together with the resin 520 in a semi-melt state to form a flexible sheet 501 having a flexible sheet shape. Manufacturing step.

In this case, it is preferable to use a thermoplastic as the resin raw material 110. For example, various resins such as PP, PE, PA6, PA66, PA46, PET, PPS, PPO, MPPO may be used. The reinforcing fiber 120 is a reinforcing material having a higher stiffness and higher melting point than the resin raw material 110, and for example, various fibers such as carbon fiber, glass fiber, aramid fiber, and basalt fiber may be used. Reinforcing fiber 120 is provided in the form of a continuous fiber, it may be cut to a length of 10 ~ 50mm in the extruder (100).

In the second step, the soft sheet 501 discharged from the extruder 100 is interposed between the first gearwheel 230 and the second gearwheel 240 through the first upper guide 211 and the first lower guide 221. It guides and deforms into a waveform while passing the soft sheet 501 between the first gear 232 and the second gear 242.

In the third step, a space between the second upper guide 212 and the second lower guide 222 is a soft sheet 501 that is transformed into a wave while passing between the first gear 230 and the second gear 240. As it fills in, it is compressed and transformed into a thick plate shape in the waveform. In this case, the cutout 300 closes the distal ends of the second upper guide 212 and the second lower guide 222 so that the soft sheet 501 is plated between the second upper guide 212 and the second lower guide 222. To be deformed into shape.

This is because the resin 520 in the soft sheet 501 is not completely cured and has fluidity, so that the soft sheet 501 is continuously supplied through the first gear 230 and the second gear 240. As the valley narrows as the valley grows, the mountain and the mountain meet to form a mass.

As a result, the soft sheet 501 deformed in the processing unit 200 has a thicker thickness than when it is discharged from the extruder 100, and at the same time, the resin 520 is formed of the upper guide 220 and the lower guide 210. The inner surface is in contact with the flat surface.

In the fourth step, the soft sheet 501 having the planarized surface is cut into a predetermined length and the resin 520 is cured. This may be implemented by cutting the soft sheet 501 using the cutout 300 and cooling the conveyor 400.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. .

100: extruder 110: resin raw materials
120: reinforcing fiber (before extruder) 200: processing unit
211: first upper guide 212: second upper guide
221: first lower part guide 222: second lower part guide
230: First gear 231: First body
232: first gear 240: second gear
241: second body 242: second gear
300: cutting unit 400: conveyor
500: fiber reinforced composite material 510: reinforced fiber
511: flat portion 512: bend
520: resin 501: soft sheet

Claims (12)

An apparatus for manufacturing a fiber-reinforced composite material impregnated with a resin in the reinforcing fiber,
An extruder for continuously discharging the soft sheet in the form of a plate by mixing a semi-melt resin and reinforcing fibers;
A processing unit for passing the soft sheet discharged from the extruder through a pair of gears to deform the reinforcing fibers in the soft sheet into a wave; And
And a cutting part installed at an end of the processing part to block the movement of the soft sheet or to cut the soft sheet into a predetermined length.
The method according to claim 1,
The processing unit may include a first cog wheel disposed above the moving path of the soft sheet and in contact with an upper surface of the soft sheet, and a second cog wheel disposed below the moving path of the soft sheet and in contact with a lower surface of the soft sheet. and,
The first gear formed on the first cog wheel is spaced apart from the second gear formed on the second cogwheel, characterized in that to form a space for the soft sheet to move therebetween, fiber reinforced composite material manufacturing apparatus.
The method according to claim 2,
The processing unit may include a first upper guide and a first lower guide installed between the first cog wheel, the second cog wheel, and the extruder to guide the movement path of the soft sheet, and the first cog wheel and the first cog wheel. And a second upper guide and a second lower guide installed between the two gears and the cutting part to guide the movement path of the soft sheet, wherein the apparatus for manufacturing a fiber reinforced composite material.
The method according to claim 2,
The first gear and the second gear, characterized in that the widthwise length is formed longer than the widthwise length of the soft sheet, the fiber reinforced composite material manufacturing apparatus.
The method according to claim 1,
The cutting unit, the fiber-reinforced composite material manufacturing apparatus, characterized in that the blade shape for cutting the soft sheet deformed in the processing unit to a predetermined length while opening and closing.
The method according to claim 3,
The second upper guide and the second lower guide are installed spaced apart from each other in the thickness direction of the soft sheet, characterized in that spaced apart at intervals greater than the thickness of the soft sheet discharged from the extruder, fiber-reinforced composite material Manufacturing equipment.
The method according to claim 1,
The extruder, the fiber-reinforced composite material manufacturing apparatus, characterized in that orientated in a direction parallel to the direction in which the soft sheet is discharged.
The method according to claim 1,
The fiber reinforced composite material manufacturing apparatus further comprises; a conveyor for conveying while curing the soft sheet cut by the cutting unit.
As a method of manufacturing a fiber-reinforced composite material impregnated with a reinforcing fiber,
A first step of manufacturing a soft sheet in which the reinforcing fibers are oriented in one direction in the semi-melt resin;
A second step of transforming the reinforcing fiber into a wave shape while passing the soft sheet between a pair of cog wheels; And
And a third step of planarizing the surface of the soft sheet.
In the third step, the semi-melt resin contained in the soft sheet flows to fill the bones of the reinforcing fibers deformed in a wave shape to planarize the surface of the soft sheet, the fiber reinforced composite material manufacturing method .
delete The method according to claim 9,
After the third step, the fourth step of cutting the soft sheet to a predetermined length and curing the resin; further comprising, fiber reinforced composite material manufacturing method.
As a fiber-reinforced composite material manufactured by passing a sheet impregnated with a reinforcing fiber between a pair of cog wheels,
A reinforcing fiber divided into a plurality of flat parts oriented in a thickness direction and a bent part connecting the flat parts adjacent to each other, and formed in a wave shape; And
Fiber reinforced composite material comprising; resin impregnated to surround the reinforcing fiber.

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