WO2014163227A1

WO2014163227A1 - Method for manufacturing composite panel provided with three-surface reinforced core material, and composite panel using same

Info

Publication number: WO2014163227A1
Application number: PCT/KR2013/003281
Authority: WO
Inventors: 김종철; 서명만
Original assignee: 주식회사 오코
Priority date: 2013-04-04
Filing date: 2013-04-18
Publication date: 2014-10-09
Also published as: KR20140120750A; KR101466478B1

Abstract

A method for manufacturing a composite panel provided with a three-surface reinforced core material, of the present invention, comprises a core material (20) together with a base panel (10), wherein the core material (20) has a three-surface reinforced structure using a plane surface and a vertical surface on the basis of the sectional surface of the core material. In addition, the resin injected using the difference between vacuum pressure and air pressure is cured at room temperature so as to manufacture a composite panel (A) having a greatly reinforced buckling strength by using the three-surface reinforced core material (20), and particularly, the fundamental limitation, which the sandwich panel of a two-dimensional plane surface reinforced structure has, of increasing in rigidity and strength can be resolved by a three-dimensional reinforced core material type sandwich panel.

Description

Composite panel manufacturing method with three-sided reinforcement core and composite panel using the same

The present invention relates to a composite panel having a reinforcing core material, in particular, having a three-sided reinforcing core material that does not use a short resin curing time and a high temperature heat curing process compared to a hand lay-up method and an infusion method. It relates to a composite panel manufacturing method and a composite panel using the same.

In general, composite panels have strong durability, which is essential in the medical field for stably fixing and supporting high-weight equipment, and in the automotive field for blocking shocks from vehicle interior transmission by absorbing strong shock in the event of a collision or crash. It is used.

For example, a composite panel may be used as a medical pedestal (table or cradle) in the medical field, and used as a bumper or body reinforcement in the automobile field.

The composite panel has a structure in which a core material (reinforcement) is added to prevent buckling or bending in a limited thickness of panel by increasing the cross-sectional coefficient of a part constituting the member.

For example, the core material (reinforcement material) permeates the resin to the glass fiber or carbon fiber that surrounds the reinforcement material integrally with the panel on the principle of surface tension, and is integrally molded to the panel by its curing action.

As a manufacturing example of such a composite panel, there is a hand lay-up method. In one example, the hand lay-up method is a panel manufactured using a release agent, a gel coat agent, a glass fiber fabric, and a polyester resin, and then bonded to each other in a state in which the core material separately manufactured on the panel is in surface contact. Then, paint is done to make it.

As such, the composite panel is manufactured by applying a method other than the hand lay-up method, and thus, there is an advantage that the manufacturability can be improved more than the hand lay-up method.

However, in the composite panel manufacturing method, the resin is penetrated into the composite fiber (glass or carbon) in a flat die, hand lay-up or vacuum molding is followed, and then 135 ° C. in an oven. Above, at least 4 hours or at room temperature (15 ℃) for at least 48 hours, the base panel is first molded and fabricated, and then the core material (reinforcement) is placed on the fabricated base panel, and then the same glass fiber or carbon as the base panel After wrapping the reinforcement with the fibers (wrapping), the resin is permeated (resin) is completed in the same process as above.

For this reason, in the manufacturing process of the composite panel, the curing time of the resin (Resin) is long, and there are many series of manual processes.

In addition, the Hand Lay-up process is difficult to manufacture due to the impregnation unevenness or excessive resin ratio when the synthetic resin is applied. Especially, when the fiber is pressed by hand, the yield of a good product depends on the skill of the operator. There are many differences and there are many more differences in finishing, which makes it difficult to equalize good product quality.

In addition, the Infusion method is difficult to sufficiently satisfy the panel rigidity or mechanical performance due to the high ratio of synthetic resins when manufacturing the composite panel, and in particular, it is not easy to inject resin in a three-dimensional curved product, resulting in defects. This is often the limit.

Accordingly, the present invention in view of the above point is made of resin penetration in the vacuum pressure in the state in which the core (reinforcement) located in the interior of the composite panel (wrapping material) is wrapped on three sides using a plane and a vertical plane. It has a short curing time for curing the resin but no product quality variation according to the operator's skill. Especially, since the high temperature heating process is not used, the composite material with three-sided reinforcement core can shorten the manufacturing process and can be manufactured outdoors. The purpose is to provide a panel manufacturing method.

In addition, the present invention in view of the above point is strengthened by buckling rigidity is reinforced by the three-sided reinforcement of the core material located inside the composite panel (Composite Panel) using a plane and a vertical surface based on the core cross-section, in particular glass fiber It is an object of the present invention to provide a three-sided reinforcement core type composite panel in which weight reduction is achieved by using glass fabric or carbon fabric.

Composite panel manufacturing method having a three-sided reinforcement core material of the present invention for achieving the above object includes a base panel, a core material, a fiber for wrapping, a cotton fiber for reinforcement and a resin to form a fixed state An arrangement process of reinforcing the core with the cotton fibers and then arranging the core to be a composite panel assembly after the core is wrapped with the fibers;

A bagging process of wrapping and wrapping the composite panel assembly, hermetically treating the interior to be blocked from the outside in the packaged state, and forming a vacuum into the interior of the hermetically sealed state to form a composite panel bundle body;

Resin is injected into the inside of the composite panel bundle by the vacuum, and the injected resin is impregnated into three surfaces of the core along the resin flow path formed along the core to be made into the composite panel fixing body. fair;

A curing process of curing the resin impregnated in the composite panel fixture at room temperature, and curing the resin to form the composite panel by fixing the base panel and the core in a fixed state; Characterized in that performed.

When the core material is formed of a plurality of core blocks having a predetermined size, the plurality of core blocks are wrapped with the fibers and then stitched to be connected in the form of core bars.

The fiber is carbon fabric or glass fabric, and the resin is a polyester resin or a vinyl ester resin.

The cotton fiber is padded on a plane in surface contact with the base panel and a vertical plane perpendicular to the plane of the cross section of the core material.

The packaging is applied with a bagging film, the hermetic sealant is applied with sealant, and the formation of the vacuum removes the air from the inside of the packaged state.

The resin is injected into the interior of the composite panel bundle in a state of being placed in a reservoir placed under atmospheric pressure, the resin flow path is formed through the cotton fiber reinforced the core material, the resin reservoir and the composite panel bundle The interior is connected by pipes.

In addition, the three-sided reinforcement core type composite panel of the present invention for achieving the above object includes a base panel and a core material positioned on the base panel; The reinforcement of the core is perpendicular to the plane and the plane in contact with the base panel in the cross section of the width of the core in the state in which the core is wrapped with carbon fabric or glass fabric. Consisting of fibers padded on the vertical plane; The fixing of the core, the plane of the core in contact with the base panel is applied to the resin impregnated in the fiber to form a fixed state with the fiber, the vertical surface of the core is applied to the resin impregnated in the fiber It is characterized by forming a state of fixation with the fiber.

The core is composed of a plurality of core blocks of a predetermined size, the plurality of core blocks are wrapped with the carbon fiber (Wrapping) and then stitched (stitched) are connected in the form of core bar; The fibers are cotton fibers; The resin is a polyester resin or vinyl ester resin.

In the present invention, the resin penetration into the core material (reinforcement material) located inside the composite panel is made by vacuum pressure, so that the curing time for curing the resin is shortened. By having a three-sided wrapping (Wrapping) state by using the product has the effect of being manufactured without variation in product quality according to the skill of the operator.

In addition, the present invention has the effect that the resin penetrated into the composite panel (Composite Panel) having a core material (reinforcement) therein can be made in the outdoors with a shortening of the manufacturing process by natural curing without high temperature heating process.

In addition, the present invention has a three-side wrapping structure using a flat and vertical surface core material provided inside the composite panel (Composite Panel), in particular, the three-side wrapping (Wrapping) glass fiber (Glass Fabric) or carbon fiber By being made of (Carbon Fabric) has a high buckling rigidity, but also the effect of being lightweight.

In addition, the present invention has excellent applicability to three-dimensional curved-shaped products even when the Infusion method is applied to the manufacture of a composite panel having a core material (reinforcement) therein, in particular, hand lay-up Even if the Lay-up method is applied, manufacturing difficulties can be solved due to the impregnation unevenness or excessive resin ratio.

1 and 2 is an operation flowchart of the composite panel having a three-dimensional solid-reinforced core material (reinforcement) according to the present invention, Figure 3 is a component of the composite panel according to the present invention, Figure 4 is the present invention The resin penetrated state of the composite panel according to the present invention, Figure 5 is a block diagram of a composite panel having a three-dimensional solid-reinforced core material (reinforcement) according to the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

1 and 2 illustrate an operation flow of manufacturing a composite panel having a three-dimensional solid-state reinforced core material according to the present embodiment.

S10 is a process of preparing components for manufacturing a composite panel having a three-dimensional solid-reinforced core material, such components include a base panel of S11, a core block of S12, a wrapping fiber of S13, and a layer of S14 ( Layer) fiber, resin of S15.

Referring to FIG. 3, the base panel 10 is a basic component for making a composite panel having a three-dimensional three-dimensionally reinforced core material to be manufactured. The base panel 10 is made of a composite panel and then coupled to another base panel. Forming a space therebetween, it can be made of a sandwich type composite panel in which the core material 20 is located.

In general, the base panel 10 is a uni-directional carbon / epoxy or carbon fabric / epoxy type, and is press-molded at a constant temperature under vacuum pressure, and may cause deterioration in formability or deterioration in mechanical properties. In order to avoid impregnation of synthetic resins, 60 to 70% by weight of fabric is impregnated with 30 to 40% by weight of synthetic resin. The base panel 10 may be manufactured by an infusion method.

The core 20 is a component that reinforces the buckling rigidity of the composite panel A by being padded on the base panel 10, and includes a plurality of core blocks 20-1, 20-2, ... 20-n).

In particular, the plurality of core block (20-1, 20-2 ,,, .. 20-n) is wrapped with the wrapping fiber 30 is made of a core material 20 integrated into one, in this state core 20 ( The three-dimensional face of) is padded with layer fibers 40.

Therefore, the core 20 composed of a plurality of core block 20-1, 20-2,..., 20-n can be very useful for manufacturing a composite panel to which a small and sophisticated reinforcing structure is applied.

However, the core material 20 may be formed in an integrated shape with a size of 5m x 5m or more, and such a large-size core material 20 may be easily used to manufacture a large composite panel.

The wrapping fiber 30 surrounds a plurality of core blocks 20-1, 20-2,,.. 20-n to form a core material 20 integrated into one, and is formed of glass fabric or carbon. Made of Carbon Fabric. In general, the wrapping fiber 30 is used in the form of carbon fiber fabric or glass fiber fabric, it may be used to select one or more.

The layer fiber 40 is a three-dimensional in the state consisting of a core material 20 is integrated with a plurality of core block (20-1, 20-2 ,,,, .20-n) wrapped in a wrapping fiber 30 and integrated into one Padded with cotton For example, when the core 20 is a rectangular bar having a width cross section of the rectangular cross section, the layer fiber 40 is a plane (xy in the x, y, z coordinates) and a vertical plane (x) formed by the rectangular cross section of the core 20. By being padded to surround z in the y, z coordinates, the core material 20 may be three-dimensional solid reinforcement rather than two-dimensional planar reinforcement.

The layer fiber 40 is made of cotton fiber.

The resin 50 is applied to the surfaces bonded to each other, a polyester resin or a vinyl ester resin is applied, but various resin types having equivalent physical properties may be applied. Usually, it is preferable to use synthetic resin by selecting 1 type from polyester resin or vinyl ester resin.

On the other hand, S20 to S50 is a process for manufacturing a composite panel having a three-dimensional solid-reinforced core material, which is a layout process of S20, a bagging process of S30, an impregnation process of S40, a curing process of S50 sequentially It is completed by going to.

The layout process of S20 is performed by sequentially performing the steps of wrapping of S21, stitching of S22, reinforcing three sides of S23, and securing a resin passage.

Referring to FIG. 4, the wrapping of S21 is simply performed by wrapping the wrapping fiber 30 made of glass fabric or carbon fabric on the core 20.

At this time, if the core 20 is composed of a plurality of core block 20-1,20-2 ,,,. 20-n, a plurality of core block (20-1,20-2 ,,,,. 20) -n) is wrapped in a glass fiber or carbon fiber in a state in a row. As described above, the core 20 composed of the plurality of core blocks 20-1, 20-2,,..., 20-n is applied to the manufacture of a composite panel to which a small and sophisticated reinforcement structure is applied.

On the other hand, when the core material 20 is formed in an integrated shape with a size of 5m x 5m or more, the core material 20 is wrapped with glass fiber (Glass Fabric) or carbon fiber (Carbon Fabric). The core material 20 having a large size having a single shape integrated as described above is applied to the production of a large composite panel.

In addition, the stitching of S22 is a process of sewing glass fabric or carbon fabric wrapped with the core 20, in which case the yarn for stitching is glass fiber (Glass). Fabric) or carbon fiber.

In addition, the three-side reinforcement of S23 is a process of adding a layer fiber 40, which is cotton fiber, to a core material 20 wrapped and stitched with glass fabric or carbon fabric. Is performed.

For example, if the cross section of the core 20 has a square cross section, the cotton fiber completely surrounds the plane (xy in x, y, z coordinates) and the vertical plane (z in x, y, z coordinates) formed by the square cross section. Is attached. At this time, the cotton fiber is continued until the three sides are reinforced to the required thickness.

In particular, in this three-side reinforcement work, the flow path of resin flowing along the cotton fiber should be sufficiently secured, and the resin flow injected through the x, y, and z coordinates in the x, y, and z directions, respectively. It can be made smoothly. In this case, the flow in the x direction and the y direction is a plane formed by the core material 20 in contact with the base panel 10, and the flow in the z direction means a vertical plane formed by the core material 20.

Such reinforcement may be performed by a hand lay-up method.

Therefore, when the wrapping of S21 and the stitching of S22 and the reinforcement of the three sides of S23 and securing the resin passage are completed in the layout process of S20, the composite panel assembly A-1 is completed as in S24. Can be.

The composite panel assembly (A-1) is a state in which a core material 20 reinforced with cotton fibers on three sides of a width cross section is placed on the base panel 10 while being wrapped with carbon fabric.

On the other hand, the S30 bagging process is a bagging film wrapped with a bagging film of S31, a sealing that forms airtightness with a sealant of S32, and maintains the airtightness of S33. This is done by sequentially performing a vacuum (Vacuum) step of forming a vacuum in the package.

Referring to FIG. 4, the bagging of S31 is based on the base panel 10 having the core 20 reinforced with cotton fibers on three sides of the cross section in a state of being wrapped with carbon fabric. It is simply made by wrapping with a bagging film (60, Bagging Film).

In addition, the sealing of the S32 is simply made by the airtight treatment with a sealant 70 to seal the inside of the package in a wrapped state wrapped with the bagging film 60.

In addition, the vacuum of S33 is simply made by wrapping the bagging film and extracting the air therein while being sealed with a sealant. In other words, when the vacuum pressure is applied, the entire material and the bagging film are closely adhered without space while the air inside the air is released due to the vacuum pressure. This vacuum operation usually uses a vacuum forming apparatus, and can apply a vacuum at a negative pressure of about -722 to -798 mmHg.

Therefore, when bagging of S31, sealing of S32, and vacuum of S33 are completed in the bagging process of S30, the composite panel bundle A-2 can be completed as in S33. have.

The composite panel bundle (A-2) is a state in which a core material 20 reinforced with cotton fibers on three sides of the cross section is placed on the base panel 10 in a state of being wrapped with carbon fabric. The inside is vacuum packed.

On the other hand, the impregnation process of S40 is made through the resin (Resin) setting of S41, and the resin (Resin) suction of S42.

Resin setting of S41 consists of a simple operation of putting resin in a water tank and immersing the pipe in a water tank. In general, the pipe has a vacuum pressure (composite panel bundle (A-2)). It is connected to the vacuum pressure inlet.

Resin inhalation of S42 is achieved by inhaling the resin through the pipe without the use of additional power, due to the nature of the internal vacuum pressure to return to atmospheric pressure.

Referring to FIG. 4, the resin 50 is sucked into the inside of the composite panel bundle A-2 in a vacuum state due to the difference between the vacuum and the atmospheric pressure, and the sucked resin 50 is cotton fiber reinforced with the core 20. It penetrates into the three surfaces of the core material 20 while flowing along the resin flow path formed therein.

That is, this resin flow flows along the z-direction and the plane flow (xy) flowing along the x and y directions of the x, y, z coordinates when the rectangular cross section of the core material 20 is divided into x, y, z coordinates. Vertical flow z may be formed at the same time.

Therefore, the core material 20 may be surrounded by the vertical 50 flowing along the x direction and the y direction and the z direction, whereby the resin 50 sufficiently penetrates the wrapping fiber 30 via the layer fiber 40. As a result, the adhesion state to the core material 20 and the adhesion state to the base panel 10 are strongly formed.

In particular, the vacuum pressure state is to return to the atmospheric pressure state, the resin 50 is molded at once into the three sides of the core material 20 at a time at room temperature, the resin (50) until the internal vacuum pressure of the core material 20 is atmospheric pressure ) Is impregnated evenly along the layer fibers 40 and the wrapping fibers 30.

Therefore, when the resin setting of S41 and the resin suction of S42 are completed in the impregnation process of S40, the composite panel fixing body A-3 may be completed as in S43.

The composite panel fixing body (A-3) is a state in which a core material 20 reinforced with cotton fibers is placed on the base panel 10 while three surfaces of the cross section are wrapped with carbon fabric. The carbon fiber and the cotton fiber are fixed to the resin in the state surrounding the core 20, and the core 20 and the base panel 10 are also fixed to the resin.

On the other hand, the curing step of S50 is a manner in which the resin is cured at room temperature as in S51, the room temperature curing means a temperature range before and after about 15 ℃.

As the resin is cured at room temperature, it is possible to work outdoors without a large indoor space, and the natural curing lead time may be relatively short. In particular, by curing at room temperature, no separate facility such as an oven generating a heating temperature of 135 ° C. or more is not required at all.

Therefore, when the room temperature curing of S51 is completed in the curing process of S50, it can be completed in the composite panel (A) as in S52.

5 shows a state in which the composite panel fixing body (A-3) is made of the composite panel (A) by curing at room temperature.

As shown, the composite panel (A) is made of the base panel 10 and the core material 20 integrally together, the core material 20 is a layer fiber (Layer) fiber 40 of the core material 20 It is composed of three-dimensional reinforcement core type by wrapping all three surfaces (plane and vertical plane).

In particular, the impregnated resin penetrates into the layer fibers 40 and the wrapping fibers 30, so that the plane in which the core 20 and the base panel 10 contact each other form a fixed state and at the same time the core 20 ) Also form a fixed state.

In general, another base panel is connected or fixed to the upper portion of the core 20 to form a sandwich type composite panel.

Therefore, the sandwich type composite panel manufactured by using the three-dimensional reinforcement core type composite panel A has a three-side reinforcement core 20 therein, thereby greatly strengthening the buckling stiffness. The fundamental limitations on the stiffness and strength of the panels can be removed.

As described above, in the composite panel manufacturing method having a three-sided reinforcement core according to the present embodiment, a core 20 having a three-sided reinforcement structure using a plane and a vertical plane based on the core cross section is configured together with the base panel 10. The composite panel A, in which the buckling rigidity is greatly strengthened by the three-side reinforced core 20, is manufactured by curing the resin injected using vacuum and atmospheric pressure difference at room temperature. Fundamental limitations on the stiffness and strength increase of the sandwich panel can be solved by the three-dimensional reinforcement core type sandwich panel.

Claims

A base panel, a core material, fibers for wrapping, cotton fibers for reinforcement, and a resin forming a fixed state, wherein the core is wrapped with the fibers and then reinforced with the cotton fibers And then arranging on top of the base panel to form a composite panel assembly;

A bagging process of wrapping and wrapping the composite panel assembly, hermetically treating the interior to be blocked from the outside in the packaged state, and forming a vacuum into the interior of the hermetically sealed state to form a composite panel bundle body;

Resin is injected into the inside of the composite panel bundle by the vacuum, and the injected resin is impregnated into three surfaces of the core along the resin flow path formed along the core to be made into the composite panel fixing body. fair;

A curing process of curing the resin impregnated in the composite panel fixture at room temperature, and curing the resin to form the composite panel by fixing the base panel and the core in a fixed state;

Composite panel manufacturing method with a three-sided reinforcement core, characterized in that carried out as.
The method according to claim 1, wherein in the arrangement process, if the core material is made of a plurality of core blocks having a predetermined size, the plurality of core blocks are wrapped with the fiber (strap) and stitched (stitched) and connected in the form of a core bar Composite panel manufacturing method with a three-sided reinforcement core material, characterized in that.
The composite with a three-sided reinforcement core according to claim 1, wherein in the arrangement process, the fibers are carbon fabric or glass fabric, and the resin is a polyester resin or a vinyl ester resin. Panel manufacturing method.
The composite panel according to claim 1, wherein, in the arranging step, the cotton fiber is padded on a plane in contact with the base panel and a vertical plane perpendicular to the plane among the cross-sections of the core. Manufacturing method.
The method of claim 1, wherein in the bagging process, a bagging film is applied to the packaging, a sealant is applied to the airtight treatment, and the formation of the vacuum is performed inside the packaged state. Composite panel manufacturing method with a three-sided reinforcement core, characterized in that to extract air.
The method of claim 1, wherein in the impregnation step, the resin is injected into the inside of the composite panel bundle in a state of being placed in a water tank placed under atmospheric pressure, and the resin flow path is formed through the cotton fiber reinforced the core material Composite panel manufacturing method with three-sided reinforcement core material.
The composite panel manufacturing method according to claim 6, wherein the resin reservoir and the inside of the composite panel bundle are connected by pipes.
The composite panel manufacturing method according to claim 1, wherein in the curing step, the room temperature is 15 ° C.
A base panel and a core positioned on the base panel;

The reinforcement of the core is perpendicular to the plane and the plane in contact with the base panel in the cross section of the width of the core in the state in which the core is wrapped with carbon fabric or glass fabric. Consisting of fibers padded on the vertical plane;

The fixing of the core, the plane of the core in contact with the base panel is applied to the resin impregnated in the fiber to form a fixed state with the fiber, the vertical surface of the core is applied to the resin impregnated in the fiber A three-sided reinforcement core type composite panel, characterized by forming a state of fixation with fibers.
10. The method of claim 9, wherein the core is composed of a plurality of core blocks of a predetermined size, the plurality of core blocks are wrapped with the carbon fabric (Wrapping) and then stitched (stitched) connected in the form of a core bar Become;

The fibers are cotton fibers;

The resin is a polyester resin or vinyl ester resin; three-sided reinforcement core type composite panel, characterized in that.