KR102486943B1 - Carbon Fiber Cutting Apparatus - Google Patents

Abstract

The present invention relates to a device for cutting carbon fiber used in CFRP production in a specific pattern, wherein a cutting plate is made of a metal material, and an ultrasonic knife moves through the carbon fiber to cut the carbon fiber in a specific pattern. Since the groove is formed and cut in the same pattern as the pattern, the cutting plate can be used permanently when the pattern is not changed.

Description

Carbon fiber cutting apparatus for manufacturing carbon fiber reinforced plastic {Carbon Fiber Cutting Apparatus}

The present invention relates to an apparatus for cutting carbon fibers used in manufacturing carbon fiber reinforced plastics into a specific pattern.

In order to solve the current energy, environmental, and resource problems of the automobile, aircraft, ship, and railway vehicle industries, new materials and their processing technologies that can realize lightweight, high-performance, high-efficiency, and resource saving/recycling can be realized. development is becoming a challenge.

In recent years, as the development of lightweight transportation equipment has become an urgent priority, various composite materials have been adopted, and among them, carbon fiber reinforced plastic (hereinafter referred to as CFRP) has already been applied to many parts of airframes in the aircraft industry.

In order to manufacture CFRP, the carbon fiber shown in FIG. 7 is required, and the carbon fiber is cut according to a specific pattern before manufacturing CFRP.

8 is a view showing a conventional general-purpose sheet cutting device. A conventional sheet cutting device is provided with an adsorption panel 12 having an adsorption hole 13 formed at the bottom of a breathable belt 21 for moving the sheet, and a vacuum chamber 15 installed under the adsorption panel 12 to vacuum. A structure in which this is generated and the seat 4 is fixed by suction force is disclosed. In this method, the sheet 4 is cut while the sheet 4 is fixed to the breathable belt 22. When the sheet is cut several times, the breathable belt 22 needs to be replaced periodically because many cuts are generated. The ventilation belt 22 is installed on the drive roller 21. In order to replace the ventilation belt 22, the drive roller 21 is disassembled and replaced, so there is a problem such as a decrease in productivity due to a delay in replacement time. There is a need for a plan for this.

In addition, conventionally, when cutting carbon fiber, it is placed on a material such as nonwoven fabric or bristle to cut the carbon fiber. Foreign matter such as foreign matter or carbon fiber chips get stuck between them, so they need to be cleaned periodically.

Therefore, there is a need for a cutting device of a new type that can be used permanently and does not require the removal of foreign substances.

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

KR 10-2042409

An object of the present invention is to provide a new type of carbon fiber cutting device equipped with a cutting plate that can be used permanently in order to solve the above problems.

A carbon fiber cutting device for manufacturing carbon fiber-reinforced plastic that fixes carbon fibers and cuts the carbon fibers into a specific pattern includes: an ultrasonic knife for cutting the carbon fibers into the specific pattern; A seating surface on which the carbon fiber is placed is formed, and a groove having the same pattern as the specific pattern is formed on the seating surface to allow the blade tip of the ultrasonic knife to pass through the carbon fiber during cutting, and the vacuum a cutting plate having a plurality of suction holes formed on the seating surface so that the carbon fibers are in close contact with the seating surface; a cutting bed having the cutting plate installed thereon and including a vacuum box communicating with the suction hole; and a vacuum pump that is connected to the vacuum box and sucks air inside the vacuum box so that the carbon fibers come into close contact with the cutting plate through a suction force generated from the suction hole.

In at least one embodiment of the present invention, the suction hole includes a plurality of pattern holes formed along the groove corresponding to the shape of the specific pattern at an inner edge or an outer edge of the groove on the seating surface.

In at least one embodiment of the present invention, the cutting plate is also formed with a suction hole at the bottom of the groove.

In at least one embodiment of the present invention, the vacuum box has a barrier rib formed in the inner space acting on the carbon fiber, and the plurality of inner spaces divided by the barrier rib are connected to the vacuum pump, respectively.

In at least one embodiment of the present invention, the cutting plate is a metallic material.

In at least one embodiment of the present invention, a supply roller for supplying the carbon fiber to the seating surface of the cutting plate by supplying the carbon fiber; a pinch roller for moving the carbon fiber supplied from the supply roller to the upper surface of the cutting plate of the cutting bed; and a winding roller installed on the other side of the cutting bed to recover the remaining carbon fibers after being cut.

In at least one embodiment of the present invention, a first inclined portion is formed that is downwardly inclined from the bottom of the pinch roller in the traveling direction of the carbon fiber.

In at least one embodiment of the present invention, a second inclined portion inclined downward from one end of the cutting bed is formed on the other side of the cutting bed so that the remaining carbon fibers after cutting flow down.

In at least one embodiment of the present invention, the winding roller is formed spaced apart from the second inclined portion at a set interval such that the carbon fiber is caught in a U shape between the end of the second inclined portion and the winding roller.

According to the carbon fiber cutting device for manufacturing carbon fiber reinforced plastic having the structure described above, the cutting plate is made of a metal material, and the ultrasonic knife moves through the carbon fiber to cut the carbon fiber in a specific pattern. Since the groove is formed and cut in the same way as, the cutting plate can be used permanently when the pattern is not changed.

1 is a view showing a cutting plate of a carbon fiber cutting device for manufacturing carbon fiber reinforced plastic according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view A - A of FIG. 1 .
3 is a view showing a state in which a cutting plate is installed in a carbon fiber cutting device for manufacturing carbon fiber reinforced plastic according to an embodiment of the present invention.
4 is a view showing a state in which carbon fibers are supplied to a cutting plate in the carbon fiber cutting device for manufacturing carbon fiber reinforced plastics according to an embodiment of the present invention.
5 is a view showing how carbon fibers are cut by an ultrasonic knife in the carbon fiber cutting device for manufacturing carbon fiber reinforced plastics according to an embodiment of the present invention.
6 is a view showing how carbon fibers are cut and remaining carbon fibers are moved in the carbon fiber cutting device for manufacturing carbon fiber reinforced plastics according to an embodiment of the present invention.
7 is a view showing a conventional carbon fiber.
8 is a view showing a conventional general-purpose sheet cutting device.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

Terms including ordinal numbers such as “first” and “second” may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

The term "and/or" is used to include any combination of a plurality of items that are the subject matter. For example, "A and/or B" means including all three cases such as "A", "B", and "A and B".

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

In the description of the embodiments, each layer (film), region, pattern or structure is "on" or "under" the substrate, each layer (film), region, pad or pattern. The substrate formed on includes all those formed directly or through another layer. The criterion for "up/up" or "down/down" is based on the appearance shown in the drawing for convenience, and is only used to indicate the relative positional relationship between components for convenience, and is intended to limit the location of actual components. should not be understood For example, “above B” only indicates that B is shown above A on the drawing, unless otherwise stated or when A or B must be located above B due to the nature of A or B, and B in actual products, etc. may be located under A, or B and A may be placed sideways.

In addition, since the thickness or size of each layer (film), region, pattern, or structure in the drawing may be modified for clarity and convenience of description, it does not entirely reflect the actual size.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings, but the same or corresponding components regardless of reference numerals are given the same reference numerals, and overlapping descriptions thereof will be omitted.

A carbon fiber cutting device for manufacturing carbon fiber reinforced plastic according to an embodiment of the present invention includes an ultrasonic knife 100, a cutting plate 120, a cutting bed 180, and a vacuum pump 300.

The ultrasonic knife 100 cuts the carbon fiber 170 into a specific pattern. In this embodiment, a star-shaped pattern is shown as an example for easy explanation as shown in FIG. there is.

As shown in FIG. 2 , the ultrasonic knife 100 includes a blade 110 and an ultrasonic generator.

Referring to FIG. 1 , the cutting plate 120 includes a seating surface 130 on which the carbon fibers 170 are placed.

As shown in FIG. 2, on the seating surface 130, the edge of the blade 110 of the ultrasonic knife 100 penetrates the carbon fiber 170 during cutting, and the blade 110 is formed in a direction perpendicular to the penetrating direction. A groove 160 is formed to allow the end to move without contacting the seating surface 130 .

Although not shown in the drawing, the cross section of the groove 160 may be formed in a V-shape or a U-shape.

Grooves 160 are formed in the same pattern as the pattern to cut the carbon fibers 170. For example, when the carbon fibers 170 are cut in a star shape shown in FIG. 1, the grooves 160 are also formed in a star shape. The ultrasonic knife 100 is installed on a robot arm (not shown) and is set to be moved along the groove 160 by the robot arm.

In addition, a plurality of suction holes 140 are formed on the seating surface 130 so that the carbon fibers 170 adhere to the seating surface 130 by vacuum. The suction hole 140 is a suction hole around the above-mentioned groove 160 to increase the fixing force of the carbon fiber 170 when the blade 110 of the ultrasonic knife 100 cuts the carbon fiber 170 ( 140) can be formed.

Specifically, as shown in FIG. 1, the suction hole 140 corresponds to the shape of a specific pattern at the inner edge or outer edge of the groove 160 on the seating surface 130, and a plurality of patterns formed along the groove 160. A hole 150 may be included. In the pattern hole 150, when the ultrasonic knife 100 cuts the carbon fiber 170 along the groove 160, both sides of the groove 160 are in close contact, so that the effect of pressing and supporting the carbon fiber can be achieved. there is.

In the cutting plate 120, a suction hole 140 may be formed at the bottom of the groove 160, and the effect of preventing the carbon fiber 170 placed on the groove 160 from sliding during the cutting process can be achieved.

The cutting plate 120 may be a metal material in which the surface of the seating surface 130 is polished smoothly. The metal material may be stainless steel or aluminum material that is easy to recycle. In the case of aluminum, when the carbon fiber 170 needs to be cut into a different pattern, the cutting plate 120 is melted, and then the pattern hole 160 and the suction hole 140 of another pattern are formed on the seating surface 130 and reused. It is possible to achieve the effect that can be done, and since the strength is weak, it is possible to achieve the effect of easy processing of the groove 160, the suction hole 140, and the pattern hole 160.

According to the embodiment, the cutting plate 120 is not limited to the material, and may be used by forming suction holes 140, pattern holes 150, and grooves 160 on wood plywood or an acrylic plate varnished on the surface. .

The cutting bed 180 includes a vacuum box 190, and a cutting plate 120 is installed on top of the vacuum box 190. In this embodiment, the vacuum box 190 has an open top, the cutting plate 120 is installed while covering the top of the vacuum box 190, and the cutting plate 120 serves as a lid to cover the vacuum box 190. ), and the inside of the vacuum box 190 communicates with the outside only by the suction hole 140 and the pattern hole 150.

When negative pressure is generated in the vacuum box 190, external air flows into the suction hole 140 and the pattern hole 150 of the cutting plate 120, and suction force is generated, and the suction hole 140 and the pattern hole 150 The carbon fiber 170 placed thereon adheres to the seating surface 130 .

Depending on the embodiment, the vacuum box 190 may have a closed top. In this case, a through hole is formed at the same position as the suction hole 140 or the pattern hole 150 formed in the cutting plate 120 at the top. The inner space of the vacuum box 190 and the outside of the vacuum box 190 may communicate with each other.

In addition, the vacuum box 190 has a partition wall 200 formed in an internal space acting on the carbon fibers 170, and a plurality of internal spaces divided by the partition wall 200 are formed by a nozzle 210, which will be described later, as a vacuum pump. 300 and each are connected. Since the internal space of the vacuum box 190 is divided in a checkerboard shape through the partition wall 200, an effect of uniformly generating negative pressure on the cutting plate 120 can be achieved.

The vacuum pump 300 is connected to the vacuum box 190 and generates a negative pressure inside the vacuum box 190 as it sucks air inside the vacuum box 190 and discharges it to the outside.

The CFRP cutting device of the present invention further includes a supply roller 220, a pinch roller 230, and a take-up roller 240.

The supply roller 220 supplies the carbon fibers 170 to the seating surface 130 of the cutting plate 120 . As shown in FIGS. 4 to 6 , the supply roller 220 is a component of the pinch roller 230 to be described later so that the carbon fiber 170 can be supplied toward the pinch roller 230 without a device for pulling the carbon fiber 170. It may be desirable to be located on top. The supply roller 220 may be rotated by itself by a first motor (not shown) and may be rotated while pulling the carbon fiber by a pinch roller to be described later.

The pinch roller 230 moves the carbon fiber 170 supplied from the supply roller 220 to the upper surface of the cutting plate 120 of the cutting bed 180. The pinch roller 230 is rotated by a second motor (not shown).

As shown in FIGS. 4 to 6 , a first inclined portion 250 inclined downward in the traveling direction of the carbon fiber 170 is formed below the pinch roller 230 . The first inclined portion 250 is a cutting plate 120 that is supplied by the pinch roller 230 without a device that pulls the carbon fiber 170. ) plays a role in ensuring a stable supply. The pinch roller 230 may make surface contact with the first inclined surface 260 of the first inclined portion 250, and the surface of the first inclined surface 260 may be in a smooth polished state.

On the other side (left side of the drawing) of the cutting bed 180, a second inclined portion 270 inclined downward from one end to the other end of the cutting bed 180 so that the remaining carbon fiber 170 after cutting flows down by gravity. ) is formed. As shown in FIGS. 4 to 6 , the second inclined portion 270 is installed on the other side of the cutting bed, and the remaining carbon fibers 170 after cutting are newly supplied by the pinch roller 230 before cutting. While being pushed from the cutting plate 120 by the fiber 170, it is pulled downward by the weight of the carbon fiber 170 by the second inclined portion 270, and the carbon fiber 170 remaining after the cutting is completed is newly supplied. It achieves the effect of solving problems such as wrinkles without being pushed out by the carbon fibers 170. The surface of the second inclined surface 280 of the second inclined portion 270 may be in a smooth polished state.

The winding roller 240 is installed on the other side (left side in the drawing) of the cutting bed 180 to recover the remaining carbon fibers 170 after being cut. The winding roller 240 is rotated by a third motor (not shown).

As shown in FIGS. 4 to 6, the winding roller 240 is a second inclined portion ( 270) and are spaced apart from each other at set intervals. After the cutting discharged downward through the second inclined portion 270 is completed, the remaining carbon fibers 170 are stably stacked in the collection container 290 so that a large amount of carbon fibers remaining after cutting in the collection container 290 ( 170) to achieve the effect of being contained.

Next, a process of cutting the carbon fiber 170 will be described with reference to FIGS. 3 to 6 .

Referring to FIG. 3 , the carbon fiber 170 is wound only on the supply roller 220 , and the cutting plate 120 having a specific pattern is installed on the vacuum box 190 .

Referring to FIG. 4 , carbon fibers 170 are supplied from a winding roller 240 and supplied onto a cutting plate 120 through a pinch roller 230 . When the carbon fibers 170 are supplied onto the cutting plate 120, negative pressure is generated and the carbon fibers 170 are fixed.

Although not shown in the drawing, the carbon fiber 170 placed on the cutting plate 120 before the carbon fiber 170 is wound around the winding roller 240 is cut by the ultrasonic knife 100 as shown in FIG. and the cut carbon fibers 170 move separately, and the remaining carbon fibers 170 after cutting pass through the second inclined portion 270 and are wound around the take-up roller 240. An act of initially winding the winding roller 240 can be performed by a worker.

After the carbon fibers 170 are cut, the carbon fibers 170 are again cut into a specific pattern through the above process, and the carbon fibers 170 remaining after the cut are collected in the collection container 290.

Although the above has been described with reference to the embodiments, these are only examples and do not limit the present invention, and those skilled in the art to which the present invention belongs will not deviate from the essential characteristics of the present embodiment. It will be appreciated that various variations and applications are possible. For example, each component specifically shown in the embodiment can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

100: ultrasonic knife
110: blade
120: cutting plate
130: seating surface
140: suction hole
150: pattern hole
160: home
170: carbon fiber
180: cutting bed
190: vacuum box
200: bulkhead
210: nozzle
220: supply roller
230: pinch roller
240: winding roller
250: first slope
260: first slope
270: second slope
280: second slope
290: recovery container
300: vacuum pump

Claims (9)

In the CFRP cutting device for fixing the carbon fiber and cutting the carbon fiber in a specific pattern,
an ultrasonic knife for cutting the carbon fiber into the specific pattern;
A seating surface on which the carbon fiber is placed is formed, and a groove having the same pattern as the specific pattern is formed on the seating surface to allow the blade tip of the ultrasonic knife to pass through the carbon fiber during cutting, and the vacuum a cutting plate having a plurality of suction holes formed on the seating surface so that the carbon fibers are in close contact with the seating surface;
a cutting bed having the cutting plate installed thereon and including a vacuum box communicating with the suction hole; and
A vacuum pump that is connected to the vacuum box and sucks air inside the vacuum box so that the carbon fiber adheres to the cutting plate through the suction force generated from the suction hole.
including,
The suction hole comprises a plurality of pattern holes formed along the groove corresponding to the shape of the specific pattern at the inner edge or outer edge of the groove on the seating surface. Device. delete According to claim 1,
The cutting plate is a carbon fiber cutting device for producing carbon fiber reinforced plastic, characterized in that the suction hole is formed at the bottom of the groove. According to claim 1,
The vacuum box has a partition wall formed in an inner space acting on the carbon fiber, and a plurality of the inner spaces divided by the partition wall are connected to the vacuum pump, respectively. . According to claim 1,
The cutting plate is a carbon fiber cutting device for producing carbon fiber reinforced plastic, characterized in that the metal material. According to claim 1,
a supply roller supplying the carbon fibers to the seating surface of the cutting plate;
a pinch roller for moving the carbon fiber supplied from the supply roller to the upper surface of the cutting plate of the cutting bed; and
A carbon fiber cutting device for manufacturing carbon fiber reinforced plastics, further comprising a winding roller installed on the other side of the cutting bed to recover the carbon fibers remaining after being cut. According to claim 6,
Carbon fiber cutting device for manufacturing carbon fiber reinforced plastic, characterized in that the first inclined portion is formed downwardly inclined from the lower portion of the pinch roller in the traveling direction of the carbon fiber. According to claim 6,
A carbon fiber cutting device for manufacturing carbon fiber reinforced plastic, characterized in that a second inclined portion inclined downward from one end of the cutting bed is formed on the other side of the cutting bed so that the carbon fiber remaining after cutting flows down. According to claim 8,
The winding roller is carbon fiber cutting for manufacturing carbon fiber reinforced plastic, characterized in that the carbon fiber is formed spaced apart from the second inclined portion at a set interval so that the carbon fiber is caught in a U shape between the end of the second inclined portion and the winding roller. Device.

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