KR102202380B1 - Composite material producing apparatus, and method of the same - Google Patents

Abstract

The present invention can minimize or cool the generation of heat due to friction with the spreading roll or fibers generated in the process of passing the fibers, thereby improving the surface quality of the fibers, thereby improving the quality of the composite material. In order to provide an apparatus and method for manufacturing a composite material, the apparatus for manufacturing a composite material according to an embodiment of the present invention includes a fiber supply unit to which a plurality of fibers are supplied; At least one spreading roll guiding the supply of the fibers so that the fibers supplied from the fiber supply unit are spread so as to have uniform intervals; An impregnation mold for forming a composite material by impregnating the fibers guided on the spreading roll with a resin; And a cooling unit provided to cool the fiber.

Description

Composite material manufacturing apparatus and method {COMPOSITE MATERIAL PRODUCING APPARATUS, AND METHOD OF THE SAME}

The present invention relates to an apparatus and method for manufacturing a composite material, and more particularly, to an apparatus and method for manufacturing a composite material improved to uniformly spread and supply continuously supplied fibers.

In general, a composite material is a material used by mixing one or more materials, and an example of such a material is a composite material impregnated by mixing resin and fiber.

Such a composite material may have different strength and hardness characteristics depending on the type of resin and fiber to be mixed, the length of the fiber, and the mixing method.For example, it may have similar strength and light weight compared to metal. have.

Referring to Fig. 1, which is a configuration diagram of a composite material manufacturing apparatus according to the prior art, the conventional composite material manufacturing apparatus 1 includes a fiber supply unit 10 for continuously supplying fibers S1, and a fiber supply unit ( The fibers S1 supplied from 10) are guided by a plurality of spreading rolls 20, a constant tension is maintained, spread widely, and arranged in one layer to be supplied.

In this way, the fibers S1 passing through the spreading roll 20 are supplied to the impregnating mold 30, and impregnated with the resin in the impregnating mold 30, and formed into a composite material S2.

However, in the conventional composite material manufacturing apparatus 1, heat is lost due to contact with the spreading roll 20 and friction with other adjacent fibers S1 in the process of passing the fibers S1 through the spreading roll 20. It is generated, and the fiber (S1) is deteriorating by such heat, and the sizing agent coated on the surface of the fiber (S1) is easily removed, and the burr (B; Burr) where the surface of the fiber (S1) irregularly occurs. Is a factor that occurs. In particular, in the present embodiment, carbon fibers are used to increase the strength of the composite material (S2), and when the carbon fibers are heated to 100 to 120 degrees, the surface may be peeled off easily.

In this way, conventionally, when the sizing agent on the surface of the fiber (S1) is removed, and when a burr (B) occurs, frictional heat is generated higher in the fiber (S1), which may damage the fiber (S1), and the fiber (S1) The resulting burr (B) may become entangled with the burr (B) of another adjacent fiber (S1), which may deteriorate the unfolding performance, and physical damage due to thermal damage and contact occurring in the fiber (S1) occurs, resulting in the overall fiber ( The surface quality of S1) is deteriorated, and accordingly, the quality of the finally manufactured composite material S2 is also deteriorated.

In order to solve the above problems, the present invention can minimize or cool the generation of heat due to friction with the spreading roll or fibers generated in the process of passing the fibers, thereby improving the surface quality of the fibers. It is an object of the present invention to provide a composite material manufacturing apparatus and method capable of improving the quality of composite materials.

A composite material manufacturing apparatus according to an embodiment of the present invention for solving the above technical problem includes a fiber supply unit to which a plurality of fibers are supplied; At least one spreading roll guiding the supply of the fibers so that the fibers supplied from the fiber supply unit are spread so as to have uniform intervals; An impregnation mold for forming a composite material by impregnating the fibers guided on the spreading roll with a resin; And a cooling unit provided to cool the fiber.

In addition, the cooling unit may include a refrigerant spraying unit provided adjacent to the moving line of the fiber to inject a refrigerant into the spreading roll and the fiber guided to the spreading roll.

In addition, the refrigerant injection unit may include a refrigerant supply unit for supplying a refrigerant, and at least one injection nozzle connected to the refrigerant supply unit and disposed to spray the refrigerant to a portion where the fibers are spaced apart from the spreading roll.

In addition, the refrigerant spray unit may inject the refrigerant at a pressure of 6 to 10 bar.

In addition, the refrigerant may contain air of 60 to 80 degrees.

In addition, the cooling unit may include a cooling water circulation unit disposed inside the spreading roll and circulating cooling water.

In addition, the cooling unit may include a cooling water supply unit for supplying cooling water, and a cooling water circulation pipe provided inside the spreading roll and connected to the cooling water supply unit to circulate the cooling water.

In addition, the cooling unit includes a refrigerant supply unit for supplying a refrigerant, a refrigerant circulation pipe provided inside the spreading roll to circulate the refrigerant, and a plurality of refrigerant sprays connected to the surface of the spreading roll and the refrigerant circulation pipe. May contain holes.

In addition, the feed rate of the fiber may be 3 to 9M/min.

In addition, a method for manufacturing a composite material according to another embodiment of the present invention includes a fiber supply step of continuously supplying a plurality of fibers; A spreading step of spreading the fibers supplied in the fiber supplying step using a spreading roll; A cooling step of cooling the fibers unfolded in the spreading step; And an impregnation step of impregnating a resin by supplying the fiber cooled in the cooling step to an impregnation mold.

In addition, the cooling step may be cooled by supplying a refrigerant to the fibers or the spreading roll spread in the spreading step.

In addition, the cooling step may cool the fibers and the spreading roll by spraying the refrigerant to a portion where the fibers are spaced apart from the spreading roll.

In addition, in the cooling step, the refrigerant may be injected at a pressure of 6 to 10 bar.

In addition, the refrigerant may contain air of 60 to 80 degrees.

In addition, in the fiber supply step, the feed rate of the fiber may be 3 to 9M/min.

According to the present invention, in the manufacturing process of the composite material

It is possible to minimize or cool the frictional heat with the spreading roll or the frictional heat generated between the fibers when the fibers are guided and passed through the spreading roll, thereby preventing thermal damage to the fibers, and burrs on the fiber surface. ), etc., can be prevented, thereby improving the surface quality of the fiber, thereby improving the overall quality of the composite material.

In addition, the composite material manufacturing apparatus of the present invention reduces the generation of frictional heat generated in the fibers during the process of supplying the fibers, so it is possible to increase the conveyance speed of the fibers, thereby increasing the overall productivity.

1 is a configuration diagram of a composite material manufacturing apparatus according to the prior art.
Figure 2 is a configuration diagram of a composite material manufacturing apparatus according to an embodiment of the present invention.
3 is a perspective view showing a cooling unit of the composite material manufacturing apparatus according to an embodiment of the present invention.
Figure 4 is a flow chart of a method for manufacturing a composite material according to another embodiment of the present invention.
5 is a perspective view showing a spreading roll of a composite material manufacturing apparatus according to another embodiment of the present invention.
6 is a cross-sectional view taken along line AA of FIG. 5.
7 is a perspective view showing a spreading roll of a composite material manufacturing apparatus according to another embodiment of the present invention
8 is a cross-sectional view taken along line BB of FIG. 7.

Certain terms are defined herein for convenience in order to make the invention easier to understand. Unless otherwise defined herein, scientific and technical terms used in the present invention will have the meanings commonly understood by those of ordinary skill in the art. In addition, unless otherwise specified in context, terms in the singular form are to include their plural forms, and the terms in the plural form are to be understood as including the singular form thereof.

2 is a block diagram of an apparatus for manufacturing a composite material according to an embodiment of the present invention, and FIG. 3 is a perspective view illustrating a cooling unit of the apparatus for manufacturing a composite material according to an embodiment of the present invention.

Hereinafter, an apparatus 100 for manufacturing a composite material according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The composite material manufacturing apparatus 100 according to an embodiment of the present invention may include a fiber supply unit 110, a spreading roll 120, an impregnation mold 130, and a cooling unit 140.

The composite material manufacturing apparatus 100 of the present embodiment may include a fiber supply unit 110 to which a plurality of fibers S1 are supplied. The fiber supply unit 110 may be provided in a state in which a plurality of fibers S1 are wound on a bobbin or the like, and the fibers S1 wound thereon may be continuously supplied.

The fiber (S1) provided in the fiber supply unit 110 may be of various materials such as synthetic resin, and may preferably include light and high strength carbon fiber (S1), glass fiber (S1), and the like, and a mixing ratio of 60% , 70%, etc., and other materials may be mixed.

Meanwhile, a spreading roll 120 is provided at the rear end of the fiber supply unit 110 to guide the movement of the plurality of fibers S1 supplied from the fiber supply unit 110 and to evenly spread the fibers S1. Can be.

The spreading rolls 120 may be provided in plural, and may be arranged to be staggered with each other up and down with respect to the moving line of the fibers. In addition, the fibers (S1) supplied to the spreading roll 120 are alternated with each other in the process of passing through the plurality of spreading rolls 120 and uniformly along the surface area of the spreading roll 120 in the process of changing directions. Can be unfolded.

In the present embodiment, it is described that the number of spreading rolls 120 are provided as four, but the number, installation positions, and arrangement of the spreading rolls 120 are not limited and may be variously modified.

In addition, an impregnation mold 130 may be provided at the rear end of the spreading roll 120.

The impregnated mold 130 is supplied with a fiber (S1) guided to the spreading roll 120 and is impregnated with a resin therein, and may be made of a composite material (S2).

In the impregnating mold 130, a thermoplastic resin may be used as the resin impregnated into the fibers S1, and in addition, a thermosetting resin may be used. Representative examples of such resins include epoxy, polypropylene (PP), or polyamide (PA).

On the other hand, in this embodiment, the fibers S1 spread by the spreading roll 120 are in contact with the spreading roll 120 and other fibers S1 by friction generated during the spreading process. Heat may be generated.

That is, the fiber (S1) may be heated to about 100 to 120 degrees or more by heat generated by friction with the spreading roll 120 and other fibers (S1) in the process of passing through the spreading roll 120, In this way, when the temperature of the fiber (S1) is raised, the sizing agent coated on the surface of the fiber (S1) is easily removed, and a burr (Burr) in which the surface of the fiber (S1) irregularly occurs may occur.

Accordingly, in this embodiment, a cooling unit 140 for cooling the frictional heat generated when the fibers S1 rub against the spreading roll 120 and other fibers S1 may be included.

For example, in the present embodiment, the cooling unit 140 may include a refrigerant spraying unit 142 for spraying the refrigerant G into the fibers S1 for cooling the fibers S1.

The refrigerant spraying unit 142 may be disposed adjacent to the moving line of the fiber S1, and guided by the spreading roll 120 and the spreading roll 120 to transfer the refrigerant G to the moving fiber S1. Can be sprayed.

Specifically, the coolant injection unit 142 may include a coolant supply unit 144 for supplying the coolant G, and may include at least one injection nozzle 146 connected to the coolant supply unit 144.

The spray nozzle 146 may be provided to spray the refrigerant G as a whole in the spreading area of the fiber S1 spread by the spreading roll 120. The spray nozzle 146 may be arranged to spray the refrigerant G supplied from the refrigerant supply unit 144 into the fiber S1, and preferably, the fiber S1 is spaced apart from the spreading roll 120 It may be provided to cool the spreading roll 120 together with the fiber (S1) is disposed to be sprayed.

In addition, in this embodiment, the spray nozzle 146 of the refrigerant spray unit 142 is disclosed to be installed only on the upper portion of the moving line of the fiber S1, but the position of the spray nozzle 146 is not limited, and the fiber S1 It is also possible to be disposed below the moving line of ). In addition, when the injection nozzle 146 is disposed at the bottom, it is possible to be disposed to face each other with the injection nozzle 146 on the upper part, or may be disposed to be staggered with each other.

In addition, the injection nozzle 146 may be disposed inclined so that the refrigerant G is sprayed at a predetermined angle in order to improve the cooling or spreading performance of the fiber S1.

The injection nozzle 146 of the refrigerant injection unit 142 can inject the refrigerant G at a pressure of about 6 to 10 bar, and the fibers S1 are cooled by the refrigerant G injected at a high pressure in this way. At the same time, the fluidity of the fibers S1 is increased so that it can be spread quickly and uniformly.

In addition, in this embodiment, the refrigerant G injected from the refrigerant spraying unit 142 may be about 60 to 80 degrees. Meanwhile, in this embodiment, it is preferable that air is used as the refrigerant (G), and in addition to air, an inert gas or other refrigerant (G) may be used to improve the fiber (S1), and together with the refrigerant (G) It is also possible to mix and spray performance enhancing materials, but air may be used as the refrigerant (G) in consideration of economy.

In this way, the fiber (S1) may be cooled to about 60 to 80 degrees in the process of contacting the refrigerant (G). When the fiber S1 is cooled by the refrigerant G and the surface temperature is maintained at a temperature of more than 80 degrees, the sizing agent or the like may be removed or burrs may occur on the surface.

In addition, when the fiber (S1) is cooled by the refrigerant (G) and the surface temperature is maintained at a temperature of less than 60 degrees, the fiber (S1) is supplied to the impregnating mold 130 at the rear end, and then impregnated with a resin in the impregnation mold 130. In the process, it is preferable to limit cooling to less than 60 degrees, as it may cause defects due to a decrease in fiber temperature.

In this embodiment, the fiber (S1) may be properly cooled by the cooling unit 140, the feed rate of the fiber (S1) may be proportional to the cooling capacity of the cooling unit (140). Preferably, the fiber (S1) may be supplied at a feed rate of 3 to 9M/min.

Accordingly, in the present embodiment, the fiber S1 can increase the conveying speed of the fiber S1 within the range allowed by the cooling capacity and the limit, thereby improving overall productivity.

A method of manufacturing a composite material using the composite material manufacturing apparatus configured as described above is as follows. 4 is a flowchart of a method for manufacturing a composite material according to another embodiment of the present invention.

Referring to FIG. 4, the method of manufacturing a composite material according to the present embodiment may include a fiber supply step of continuously supplying a plurality of fibers S1 (see S10).

In the fiber supplying step, a plurality of fibers S1 may be continuously supplied. The fibers S1 supplied in the fiber supply step may be supplied in a state in which a plurality of fibers S1 are overlapped with each other, and may be supplied in a multilayer state.

In the fiber supplying step, the fiber (S1) may be supplied at a feed rate of 3 to 9M/min. The feed speed of the fibers S1 may be increased or decreased according to the cooling performance of the cooling step to be described later.

In this way, the fibers (S1) supplied in the fiber supply step are supplied in the spreading step, and may be uniformly spread in the process of passing through the spreading step (see S20).

In the spreading step, the fibers S1 supplied in the fiber supplying step may be processed using the spreading roll 120, and the fibers S1 may be spread in this process.

Spreading rolls 120 may be provided in a number, and are arranged to be staggered up and down with each other to increase the transport distance of the fibers (S1), while at the same time maintaining the tension between the fibers (S1) It can be spread evenly.

On the other hand, the fiber (S1) can be heated by the heat generated by the heat generated by the friction between the adjacent fibers (S1) and the heat due to contact with the spreading roll 120 in the process of passing through the spreading roll (120). A cooling step for cooling the fiber (S1) may be performed (see S30).

The cooling step is a step of cooling the fiber (S1) and the spreading roll 120 in contact with the fiber (S1) by spraying a refrigerant from the spreading roll 120 to the fiber (S1) in which the spreading step is in progress. It is possible to cool the heat generated in the fiber (S1) in the process of moving while spreading S1).

Preferably, the cooling step may cool the fibers S1 or the spreading roll 120 by supplying a refrigerant to the spreading fibers S1 or the spreading roll 120 in the spreading step.

In the cooling step, the refrigerant may be injected at a pressure of 6 to 10 bar, and air of 60 to 80 degrees may be used as the refrigerant for effective cooling.

The fiber (S1) can be effectively cooled in the course of the cooling step, and accordingly, the sizing agent on the surface of the fiber (S1) can be prevented from being removed by thermal damage, and defects caused by thermal damage to the surface, that is, The generation of burrs can be suppressed.

On the other hand, the fiber (S1) is supplied to the impregnation mold 130 in the impregnation step, then mixed with a resin, and may be made of a composite material (S2) (see S40).

5 is a perspective view showing a spreading roll of a composite material manufacturing apparatus according to another embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5.

5 and 6, the cooling unit 140 in this embodiment is described as including a refrigerant spraying unit 142 that utilizes air as a refrigerant for cooling the fiber S1, but the cooling unit The configuration of 140 is not limited and may be variously modified.

For example, the cooling unit may be disposed inside the spreading roll 220 and may include a cooling water circulation unit through which cooling water is circulated.

That is, the cooling water circulation unit may include a cooling water supply unit including a pump or the like to supply cooling water at a high pressure, and a cooling water circulation pipe 222 provided inside the spreading roll 120. The cooling water circulation pipe 222 may be connected to the cooling water supply unit to circulate the cooling water, thereby lowering the temperature of the spreading roll 120.

The spreading roll 120 is in contact with the fiber S1 in the process of unfolding the fiber S1 and may lower the temperature of the fiber S1.

7 is a perspective view showing a spreading roll of a composite material manufacturing apparatus according to another embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along line B-B of FIG. 7.

Referring to FIGS. 7 and 8, the cooling unit may apply a method of cooling the fibers S1 by spraying a refrigerant to the fibers S1 through the spreading roll 320.

That is, the cooling unit may include a refrigerant supply unit supplying a refrigerant. In addition, a refrigerant circulation pipe 322 through which refrigerant circulates may be provided inside the spreading roll 320. In addition, the spreading roll 320 may have a plurality of refrigerant injection holes 324 connected to the refrigerant circulation pipe 322 on the surface, and the refrigerant circulation pipe 322 is connected through the refrigerant injection hole 324. The circulating refrigerant may be injected to the outside of the spreading roll 320.

Fiber (S1) can be cooled by the refrigerant sprayed from the refrigerant spray hole 322 formed on the surface of the spreading roll 320 in the process of being guided and moved by the spreading roll 320, the spreading roll 320 Mobility is improved by the refrigerant sprayed from the surface and can be spread quickly and evenly.

The present invention has been described above, but the present invention by addition, change, deletion or addition of constituent elements within the scope not departing from the spirit of the present invention described in the claims for those of ordinary skill in the relevant technical field. Various modifications and changes may be made, and this will also be said to be included within the scope of the present invention.

100: composite material manufacturing device 110: fiber supply unit
120: spreading roll 130: impregnation mold
140: cooling unit 142: refrigerant injection unit
144: refrigerant supply unit 146: injection nozzle

Claims (15)

A fiber supply unit to which a plurality of fibers are supplied;
At least one spreading roll guiding the supply of the fibers so that the fibers supplied from the fiber supply unit are spread so that they have uniform intervals;
An impregnation mold for forming a composite material by impregnating the fibers guided on the spreading roll with a resin; And
Including; a cooling unit provided to cool the fiber,
The cooling unit is disposed inside the spreading roll and includes a cooling water circulation unit through which cooling water is circulated.
Composite material manufacturing device.
A fiber supply unit to which a plurality of fibers are supplied;
At least one spreading roll guiding the supply of the fibers so that the fibers supplied from the fiber supply unit are spread so that they have uniform intervals;
An impregnation mold for forming a composite material by impregnating the fibers guided on the spreading roll with a resin; And
Including; a cooling unit provided to cool the fiber,
The cooling unit includes a cooling water supply unit for supplying cooling water, and a cooling water circulation pipe provided inside the spreading roll and connected to the cooling water supply unit to circulate the cooling water.
Composite material manufacturing device.
A fiber supply unit to which a plurality of fibers are supplied;
At least one spreading roll guiding the supply of the fibers so that the fibers supplied from the fiber supply unit are spread so that they have uniform intervals;
An impregnation mold for forming a composite material by impregnating the fibers guided on the spreading roll with a resin; And
Including; a cooling unit provided to cool the fiber,
The cooling unit includes a refrigerant supply unit for supplying a refrigerant, a refrigerant circulation pipe provided inside the spreading roll to circulate the refrigerant, and a plurality of refrigerant injection holes connected to the surface of the spreading roll and the refrigerant circulation pipe. Included
Composite material manufacturing device.
delete The method of claim 3,
The refrigerant is a composite material manufacturing apparatus containing air of 60 to 80 degrees.
delete delete delete The method according to any one of claims 1 to 3,
The fiber feed rate is 3 to 9M/min composite material manufacturing apparatus.
delete delete delete delete delete delete

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