KR102503676B1 - Cabon Fiber Cutting Apparatus - Google Patents

Abstract

The present invention relates to a device for cutting carbon fibers used in CFRP production in a specific pattern, and as the cutting pad moves, the remaining carbon fibers are moved, so that the replacement of the cutting pad is easier than the conventional belt method using rollers. can be achieved

Description

Carbon Fiber Cutting Apparatus

The present invention relates to a device for cutting carbon fibers used in CFRP production 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, 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. 12 is required, and the carbon fiber is cut according to a specific pattern before manufacturing CFRP.

13 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 attachment 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.

In order to solve the above problem, if the air permeable belt is manufactured in a pad shape, the carbon fiber cannot be continuously cut, and the carbon fiber must be placed on the pad using eye force, so there is a problem that cannot be fully automated. A solution is needed.

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

In order to solve the above problems, an object of the present invention is to provide a new type of carbon fiber cutting device in which the cut carbon fiber is moved while the cutting pad is moved.

A carbon fiber cutting device for fixing carbon fibers and cutting the carbon fibers in a specific pattern includes: an ultrasonic knife for cutting the carbon fibers in a specific pattern; a cutting pad including a seating surface on which the carbon fibers are placed, and capable of vertically ventilating the carbon fibers to adhere to the seating surface by vacuum; a cutting bed having the cutting pad installed thereon and including a vacuum box communicating with the suction hole; a vacuum pump connected to the vacuum box and sucking air inside the vacuum box so that the carbon fibers adhere to the cutting plate through a suction force generated from the suction hole; a supply roller supplying the carbon fibers to the seating surface of the cutting plate; a moving means for moving the cutting pad toward the supply roller; and a carbon fiber fixing means for fixing the carbon fiber to the cutting pad so that the carbon fiber moves together with the cutting pad.

In at least one embodiment of the present invention, the moving means moves the vacuum box to move the cutting pad, and the fixing means includes the suction force generated on the cutting pad by the operation of the vacuum pump do.

In at least one embodiment of the present invention, the carbon fiber fixing means includes: a compression unit that moves at the same speed as the cutting plate while pressing the upper surface of the carbon fiber seated on the cutting plate.

In at least one embodiment of the present invention, the compression unit is installed on a gantry installed on the cutting bed.

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 pad, a metal plate installed on the vacuum box; and a non-woven fabric having a set thickness installed on the metal plate.

In at least one embodiment of the present invention, an air injection means for levitating the carbon fibers is further included to reduce friction between the carbon fibers and the cutting pad.

According to the carbon fiber cutting device having the structure as described above, since the cutting pad moves while moving the remaining carbon fiber, it is possible to achieve an effect in which the cutting pad can be easily replaced compared to the belt method using a conventional roller.

In addition, when the cutting pad is moved to the original position, the carbon fiber is floated through air injection, thereby reducing friction between the carbon fiber and the cutting pad.

1 is a view showing a carbon fiber cutting device according to an embodiment of the present invention.
2 is a view showing a state in which the compression unit presses the carbon fiber in the carbon fiber cutting device according to an embodiment of the present invention.
3 is a view showing a state in which the carbon fiber is pulled from the supply roller while being moved like a moving means in a state where the carbon fiber is pressed by the compression unit in the carbon fiber cutting device according to an embodiment of the present invention.
4 is a view showing a state in which the carbon fiber is pulled from the supply roller while being moved like a moving means in a state in which the carbon fiber is pressed by the compression unit in the carbon fiber cutting device according to an embodiment of the present invention.
5 is a view showing how carbon fibers are cut by an ultrasonic knife in a carbon fiber cutting device according to an embodiment of the present invention.
6 is a view showing a state in which carbon fibers placed at the edge of a cutting pad are lifted by air pressure discharged by a compressor in a carbon fiber cutting device according to an embodiment of the present invention.
7 is a view showing a state in which the compression unit releases the carbon fiber fixation in the carbon fiber cutting device according to an embodiment of the present invention.
8 is a carbon fiber cutting device according to an embodiment of the present invention, the carbon fiber placed on the cutting pad is lifted by the air pressure discharged from the compressor, and the cutting pad is moved in a state in which friction with the cutting pad is reduced. it is a drawing
9 is a view showing a state in which the moving means is moved to the present position in the carbon fiber cutting device according to the embodiment of the present invention.
10 is a view showing how only the cutting pad is moved in the carbon fiber cutting device according to another embodiment of the present invention.
11 is a cross-sectional view of a cutting pad in a carbon fiber cutting device according to an embodiment of the present invention.
12 is a view showing a conventional carbon fiber.
13 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 according to an embodiment of the present invention includes an ultrasonic knife 100, a cutting pad 120, a cutting bed 180, a vacuum pump 300, a supply roller 220, a moving means, and a carbon fiber fixing means. includes

The ultrasonic knife 100 cuts the carbon fiber 170 into a specific pattern. The ultrasonic knife 100 includes a blade 110 and an ultrasonic generator that vibrates the blade 110 .

As shown in FIG. 11 , the cutting pad 120 includes a seating surface 130 on which the carbon fibers 170 are placed.

The cutting pad 120 is ventilated vertically so that the carbon fiber 170 can adhere to the seating surface 130 by vacuum. The cutting pad 120 may be a metal plate 340 installed on the vacuum box 190 and a nonwoven fabric 330 having a set thickness installed on the metal plate 340 . The nonwoven fabric 330 may be replaced periodically after cutting the carbon fiber 170 several times. The metal plate 340 includes a plurality of through-holes 320 so as to ventilate vertically.

The cutting bed 180 includes a vacuum box 190. A vacuum box accommodating portion 310 is formed on the cutting bed 180 so that the vacuum box 190 moves therein. The vacuum box 190 reciprocates in the vacuum box accommodating part 310, and the cutting pad 120 is installed on the upper part of the vacuum box 190.

In this embodiment, the vacuum box 190 has an open top, the cutting pad 120 is installed while covering the top of the vacuum box 190, and the cutting pad 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 ventilation structure formed on the cutting pad 120. Since the ventilation structure is fiber in the case of the non-woven fabric 330, ventilation is possible up and down without a separate hole, and the metal plate 340 has a plurality of through holes 320 as mentioned above, so that the vacuum box 190 The inside and outside are in communication.

When negative pressure is generated in the vacuum box 190, external air is introduced through the cutting pad 120 and suction force is generated, and the carbon fiber 170 placed on the cutting pad 120 adheres closely to the cutting pad 120. .

Depending on the embodiment, the vacuum box 190 may have a structure in which the metal plate 340 of the cutting pad 120 is integrally formed on the upper part of the vacuum box 190 .

In addition, the vacuum box 190 has a partition wall 200 formed in an inner space, and a plurality of inner spaces divided by the partition wall 200 are connected to a vacuum pump 300 to be described later by a first nozzle 210, respectively. do. 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 pad 120 can be achieved.

The vacuum pump 300 is connected to each of the plurality of vacuum boxes 190 and generates a negative pressure in the inner space of the vacuum box 190 by sucking air in the inner space of the vacuum box 190 and discharging it to the outside.

The supply roller 220 supplies the carbon fibers 170 to the seating surface 130 of the cutting pad 120 . As shown in FIGS. 1 to 10, the supply roller 220 is a pinch roller 230 to be described later so that the end of the carbon fiber 170 can be supplied toward the pinch roller 230 without a device for pulling the carbon fiber 170. ) may be preferred.

The pinch roller 230 serves to move the carbon fiber 170 supplied from the supply roller 220 in a state attached to the upper surface of the cutting pad 120 of the cutting bed 180.

As shown in FIGS. 1 to 10 , 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 formed by the pinch roller 230 pushing the carbon fiber 170 without a device for pulling the carbon fiber 170 supplied by the pinch roller 230 and the cutting pad 120 by adding its own weight. ) 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 in 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 downward due to its own weight. ) is formed. As shown in FIGS. 1 to 10, the second inclined portion 270 is installed on the other side of the cutting bed, and the remaining carbon fiber 170 after cutting is newly supplied by the pinch roller 230 before cutting. While being pushed from the cutting pad 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 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 so that the collection container can contain a large amount of carbon fibers 170 remaining after cutting achieve the effect of

The moving means reciprocates the cutting pad 120 on the cutting bed. Specifically, the moving means may reciprocate the cutting pad 120 by reciprocating the vacuum box 190 as shown in FIGS. 1 to 9 when reciprocating the cutting pad 120 . The vacuum box 190 may reciprocate by the conveyor roller 140.

In another embodiment, as shown in FIG. 10 , only the cutting pad 120 may be moved. At this time, the cutting pad 120 may be moved through an actuator (not shown) or a chain and a motor (not shown). Any driving device may be used to reciprocate the vacuum box 190 or the cutting pad 120 .

The carbon fiber fixing means fixes the carbon fibers 170 to the cutting pad 120 so that the carbon fibers 170 move together with the cutting pad 120 . Since the surface of the nonwoven fabric 330 formed on the cutting pad 120 is rough, when the carbon fiber 170 is supplied through the rotation of the pinch roller 230, the carbon fiber 170 does not move on the surface of the cutting pad 120. A problem arises. Therefore, a device for pulling the carbon fiber 170 is required. In this embodiment, a carbon fiber fixing means is provided, and the carbon fiber fixing means is the cutting pad 120 while pressing the upper surface of the carbon fiber 170 seated on the cutting plate. It includes a compression unit 161 that moves at the same speed.

The compression unit 161 is installed on the gantry 160 installed on the cutting bed 180, and the gantry 160 moves at the same speed as the cutting pad 120.

According to the embodiment, the carbon fiber fixing means is a non-woven fabric ( 330, when the cutting pad 120 moves while being in close contact with the carbon fiber 170, it can be moved while being pulled.

Since the upper surface of the cutting pad 120 is nonwoven fabric 330, since the surface is rough, when the cutting pad 120 moves under the carbon fiber 170 and returns to the original position toward the pinch roller 230, the carbon fiber 170 is formed by friction. There is a problem such as crumpling or crying. In order to solve this problem, the present invention is provided with an air injection means on one side of the vacuum box (190).

1 to 9, the compressor 150 is separately connected to the inner space of one edge (right side in the drawing) of the inner space of the plurality of vacuum boxes 190 in FIGS. 1 to 9, and the air injected by the compressor 150 is vacuum As it flows into the inner space of the box 190, it penetrates the cutting pad 120 at the top and is sprayed upward. ) and the carbon fiber 170, the effect of facilitating the movement of the cutting pad 120 is achieved. Depending on the embodiment, the outlet of the second nozzle 211 is installed at the end of the vacuum box 190 or the cutting pad 120 so that the outlet is directed upward, and the air supplied from the compressor 150 is sprayed upward while the carbon fiber 170 can injure

Next, a process of cutting the carbon fiber 170 will be described with reference to FIGS. 1 to 9 .

In the carbon fiber 170, as shown in FIG. 1, a compression unit 161 compresses the carbon fiber 170. When the carbon fiber 170 is compressed, the vacuum box 190 moves as shown in FIGS. 2 and 3 . After the vacuum box 190 moves as shown in FIG. 4 , the first wave knife 100 cuts the carbon fiber 170 as shown in FIG. 5 . After the cutting is completed, when the compression unit 161 releases compression and the compressor 150 injects air, air is injected into one side of the vacuum box 190, and the carbon fiber 170 is formed as shown in FIGS. 6 and 7 emerge as if When the carbon fiber 170 floats, as shown in FIG. 8, when the vacuum box 190 returns to its original position as shown in FIG. 9, the process shown in FIGS. 1 to 8 is repeated again while the carbon fiber 170 to foundation

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 pad
130: seating surface
140: conveyor roller
150: compressor
160: gantry
161: compression unit
170: carbon fiber
180: cutting bed
190: vacuum box
200: bulkhead
210: first nozzle
211: second 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
310: vacuum box receiving part
320: through hole
330: non-woven fabric
340: metal plate

Claims (7)

In the carbon fiber 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 a specific pattern;
a cutting pad including a seating surface on which the carbon fibers are placed, and including a plurality of through-holes capable of vertically ventilating the carbon fibers to adhere to the seating surface by vacuum;
a cutting bed having the cutting pad installed thereon and including a vacuum box communicating with the through hole;
a vacuum pump connected to the vacuum box and sucking air inside the vacuum box so that the carbon fibers adhere to the cutting pad through suction force generated from the plurality of through holes;
a supply roller supplying the carbon fibers to the seating surface of the cutting pad;
moving means for moving the cutting pad toward the supply roller; and
Carbon fiber fixing means for fixing the carbon fiber to the cutting pad so that the carbon fiber moves together with the cutting pad
Carbon fiber cutting device comprising a. According to claim 1,
The moving means moves the cutting pad by moving the vacuum box,
The carbon fiber cutting device, characterized in that the fixing means includes the suction force generated on the cutting pad by the operation of the vacuum pump. According to claim 1,
The carbon fiber fixing means is:
Carbon fiber cutting device characterized in that it comprises a compression unit that moves at the same speed as the cutting pad while pressing the upper surface of the carbon fiber seated on the cutting pad. According to claim 3,
The crimping part:
Carbon fiber cutting device, characterized in that installed on the gantry installed on the cutting bed. According to claim 1,
The vacuum box is a carbon fiber cutting device, characterized in that the barrier rib is 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. According to claim 1,
The cutting pad,
a metal plate installed above the vacuum box; and
Non-woven fabric of a set thickness installed on the metal plate
Carbon fiber cutting device comprising a. According to claim 1,
Carbon fiber cutting device characterized in that it further comprises an air injection means for floating the carbon fiber to reduce the friction between the carbon fiber and the cutting pad.

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